CVE-2024-2194: WP Statistics Plugin XSS Vulnerability

CVE-2024-2194 Overview

The WP Statistics plugin for WordPress is vulnerable to Stored Cross-Site Scripting (XSS) via the URL search parameter in all versions up to, and including, 14.5. This vulnerability stems from insufficient input sanitization and output escaping, enabling unauthenticated attackers to inject arbitrary web scripts into pages. These malicious scripts execute whenever a user accesses an injected page, potentially compromising site administrators and visitors alike.

Critical Impact

Unauthenticated attackers can inject persistent malicious scripts that execute in the context of authenticated users, potentially leading to session hijacking, credential theft, and complete WordPress site compromise.

Affected Products

• WP Statistics WordPress plugin versions up to and including 14.5
• WordPress sites utilizing vulnerable WP Statistics versions
• All users accessing pages with injected malicious scripts

Discovery Timeline

• 2024-03-13 - CVE-2024-2194 published to NVD
• 2024-11-21 - Last updated in NVD database

Technical Details for CVE-2024-2194

Vulnerability Analysis

This Stored Cross-Site Scripting vulnerability exists in the URL search parameter functionality of the WP Statistics plugin. The plugin fails to properly sanitize user-supplied input before storing it in the database and subsequently fails to escape the output when rendering it on pages. This creates a persistent attack vector where malicious JavaScript code injected through the URL search parameter remains stored and executes each time the affected page is loaded.

The unauthenticated nature of this vulnerability significantly increases its severity, as attackers do not need any credentials to exploit it. Once injected, the malicious scripts run in the browsers of all users who view the affected pages, including site administrators with elevated privileges.

Root Cause

The root cause is insufficient input sanitization when processing the URL search parameter combined with inadequate output escaping when displaying stored data. The WP Statistics plugin accepts user input through the search functionality without properly validating or sanitizing the data for malicious content. When this data is later rendered on statistics pages, it is not properly escaped, allowing embedded JavaScript to execute in the browser context.

Attack Vector

This vulnerability is exploitable over the network without requiring authentication. An attacker can craft a malicious URL containing JavaScript code in the search parameter. When this URL is processed by the WP Statistics plugin, the malicious payload is stored in the database. Any subsequent visitor to pages displaying this stored data will have the malicious script execute in their browser session.

The attack can be leveraged to steal session cookies, redirect users to phishing sites, modify page content, or perform actions on behalf of authenticated administrators. The cross-origin scope of this vulnerability means that it can affect resources beyond the immediate vulnerable component.

Detection Methods for CVE-2024-2194

Indicators of Compromise

• Unexpected JavaScript code appearing in WP Statistics database entries
• Unusual or obfuscated content in URL search parameter logs
• Reports of unexpected browser behavior or redirects from site visitors
• Suspicious admin session activity following page visits to statistics-related content

Detection Strategies

• Monitor web application logs for URL parameters containing <script> tags or JavaScript event handlers
• Implement Content Security Policy (CSP) headers to detect and block inline script execution
• Review WP Statistics plugin database tables for entries containing HTML or JavaScript code
• Deploy web application firewall (WAF) rules to detect XSS patterns in incoming requests

Monitoring Recommendations

• Enable verbose logging for WordPress plugin activity
• Set up alerts for database modifications to WP Statistics tables
• Implement real-time monitoring for CSP violation reports
• Regularly audit stored data in analytics-related database tables for anomalous content

How to Mitigate CVE-2024-2194

Immediate Actions Required

• Update WP Statistics plugin to version 14.6 or later immediately
• Audit existing WP Statistics database entries for injected scripts
• Review administrator session logs for signs of compromise
• Implement Content Security Policy headers as an additional defense layer

Patch Information

The vulnerability has been addressed in WP Statistics versions after 14.5. The fix implements proper input sanitization and output escaping for the URL search parameter. Detailed patch changes can be reviewed in the WordPress Plugin Change Log. Additional vulnerability details are available in the Wordfence Vulnerability Report.

Workarounds

• Temporarily disable the WP Statistics plugin if immediate patching is not possible
• Implement web application firewall rules to filter XSS patterns in URL parameters
• Restrict access to statistics pages to authenticated administrators only
• Deploy Content Security Policy headers with strict script-src directives to mitigate script execution

# Add Content Security Policy header to Apache configuration
# Add to .htaccess or Apache virtual host configuration
Header set Content-Security-Policy "default-src 'self'; script-src 'self'; object-src 'none';"