CVE-2025-24544: Bitcoin and Altcoin Wallets XSS Flaw

CVE-2025-24544 Overview

CVE-2025-24544 is a Reflected Cross-Site Scripting (XSS) vulnerability affecting the Bitcoin and Altcoin Wallets plugin for WordPress, developed by dashed-slug.net. The vulnerability exists due to improper neutralization of user-supplied input during web page generation, allowing attackers to inject malicious scripts that execute in the context of a victim's browser session.

This vulnerability poses a significant risk to WordPress sites utilizing the affected plugin for cryptocurrency wallet management, as successful exploitation could lead to session hijacking, credential theft, or unauthorized cryptocurrency transactions.

Critical Impact

Attackers can execute arbitrary JavaScript in users' browsers, potentially compromising cryptocurrency wallet sessions and enabling theft of sensitive financial data or unauthorized transactions.

Affected Products

• Bitcoin and Altcoin Wallets WordPress Plugin versions up to and including 6.3.1
• WordPress installations running the vulnerable wallets plugin
• Sites using dashed-slug.net cryptocurrency wallet functionality

Discovery Timeline

• 2025-02-03 - CVE-2025-24544 published to NVD
• 2026-04-23 - Last updated in NVD database

Technical Details for CVE-2025-24544

Vulnerability Analysis

This Reflected XSS vulnerability (CWE-79) occurs when the Bitcoin and Altcoin Wallets plugin fails to properly sanitize user input before including it in dynamically generated web pages. When a user clicks a specially crafted malicious link or visits a compromised page, the unsanitized input is reflected back in the server's response and executed as JavaScript code in the victim's browser.

In the context of a cryptocurrency wallet plugin, this vulnerability is particularly dangerous. An attacker could craft a malicious URL that, when clicked by an authenticated administrator or wallet user, executes JavaScript that:

• Steals session cookies or authentication tokens
• Captures wallet addresses and transaction data
• Initiates unauthorized cryptocurrency transfers
• Redirects users to phishing pages designed to capture wallet credentials

Root Cause

The root cause of CVE-2025-24544 is the failure to implement proper input validation and output encoding within the plugin's request handling mechanism. User-controlled parameters are directly embedded into HTML output without adequate sanitization, allowing script injection through reflected request parameters.

The plugin does not adequately apply WordPress's built-in escaping functions such as esc_html(), esc_attr(), or wp_kses() to user-supplied data before rendering it in the browser, creating an injection point for malicious scripts.

Attack Vector

The attack follows a typical Reflected XSS pattern where the attacker crafts a malicious URL containing JavaScript payload in vulnerable parameters. The attack requires user interaction—the victim must click the malicious link while authenticated to the WordPress site. Since this is a network-based attack with low complexity but requiring user interaction, it can be distributed through phishing emails, social media, or compromised websites.

The malicious script executes within the security context of the vulnerable WordPress domain, allowing access to cookies, session storage, and DOM manipulation capabilities that could compromise the cryptocurrency wallet functionality.

Detection Methods for CVE-2025-24544

Indicators of Compromise

• Suspicious URL parameters containing encoded JavaScript payloads targeting wallet-related endpoints
• Unusual HTTP requests with <script> tags or JavaScript event handlers in query strings
• Browser console errors indicating blocked inline script execution (if CSP is configured)
• User reports of unexpected redirects or pop-ups when accessing wallet pages

Detection Strategies

• Monitor web server logs for requests containing suspicious URL-encoded JavaScript patterns such as %3Cscript%3E, javascript:, or event handlers like onerror=
• Implement Web Application Firewall (WAF) rules to detect and block common XSS attack patterns
• Review access logs for wallet plugin endpoints receiving unusual query parameters
• Deploy browser-based XSS auditor monitoring for reflected script detection

Monitoring Recommendations

• Enable verbose logging on WordPress installations to capture full request URLs for forensic analysis
• Configure SentinelOne Singularity to monitor for suspicious JavaScript execution patterns in browser contexts
• Implement Content Security Policy (CSP) headers to restrict inline script execution and report violations
• Set up alerting for unusual authentication patterns that may indicate session hijacking attempts

How to Mitigate CVE-2025-24544

Immediate Actions Required

• Update the Bitcoin and Altcoin Wallets plugin to the latest patched version immediately
• Review server access logs for evidence of exploitation attempts against the plugin
• Invalidate all active user sessions to prevent potential session token reuse
• Implement Content Security Policy headers to provide defense-in-depth against XSS attacks

Patch Information

The vulnerability affects Bitcoin and Altcoin Wallets versions through 6.3.1. Administrators should update to the latest available version of the plugin from the WordPress plugin repository or directly from dashed-slug.net. For detailed vulnerability information and remediation guidance, refer to the Patchstack Vulnerability Report.

Workarounds

• Temporarily disable the Bitcoin and Altcoin Wallets plugin if immediate patching is not possible
• Implement a Web Application Firewall with XSS protection rules to filter malicious requests
• Restrict access to wallet functionality to authenticated users on trusted networks only
• Enable HTTP-only and Secure flags on session cookies to limit script access to authentication tokens

# WordPress configuration example - add to wp-config.php
# Enable strict HTTP-only session cookies
@ini_set('session.cookie_httponly', true);
@ini_set('session.cookie_secure', true);

# Add Content Security Policy header via .htaccess
# Header set Content-Security-Policy "default-src 'self'; script-src 'self'; object-src 'none'"