CVE-2024-47644 Overview
CVE-2024-47644 is a stored Cross-Site Scripting (XSS) vulnerability in the Copyscape Premium WordPress plugin. The flaw affects all versions up to and including 1.3.9. The issue stems from improper neutralization of user-supplied input during web page generation, classified under [CWE-79]. A Cross-Site Request Forgery (CSRF) vector enables an unauthenticated attacker to inject persistent JavaScript payloads into the plugin's stored configuration. When an administrator or other authenticated user views the affected page, the payload executes in their browser context.
Critical Impact
Attackers can execute arbitrary JavaScript in administrator browsers, leading to session theft, privilege escalation, and full WordPress site compromise.
Affected Products
- Copyscape Premium WordPress plugin versions through 1.3.9
- WordPress installations using copyscape-premium
- Sites where administrators access the plugin's configuration interface
Discovery Timeline
- 2024-10-05 - CVE-2024-47644 published to the National Vulnerability Database (NVD)
- 2026-06-17 - Last updated in NVD database
Technical Details for CVE-2024-47644
Vulnerability Analysis
The Copyscape Premium plugin fails to sanitize input passed to its settings handlers. Combined with missing CSRF token validation, an attacker can craft a malicious request that submits attacker-controlled JavaScript into plugin-managed fields. The payload persists in the WordPress database and renders without escaping when the affected admin page loads.
Because this is a stored XSS chained through CSRF, the attacker does not need valid credentials. The attack succeeds when a victim with an authenticated session visits a page hosting the forged request. User interaction is required, which is reflected in the attack vector classification.
The vulnerability scope is changed because injected scripts execute under the WordPress admin origin, enabling actions across the broader administrative interface. Successful exploitation can result in arbitrary administrative actions, cookie theft, or insertion of additional malicious content into site pages.
Root Cause
The root cause is twofold. First, the plugin omits nonce validation on state-changing endpoints, violating WordPress security guidelines. Second, output rendering does not apply context-aware escaping functions such as esc_attr() or esc_html() to stored configuration values. Both controls must be present to prevent this class of attack.
Attack Vector
An attacker hosts a malicious page containing a forged form or fetch request targeting the vulnerable Copyscape Premium endpoint. The attacker then lures a logged-in WordPress administrator to visit the page. The browser automatically submits the request with valid session cookies. The plugin stores the attacker's JavaScript payload, which subsequently executes whenever an admin loads the affected settings or output page.
No verified public proof-of-concept code is available. See the Patchstack advisory for additional technical context.
Detection Methods for CVE-2024-47644
Indicators of Compromise
- Unexpected <script> tags, event handlers, or encoded JavaScript in Copyscape Premium configuration values stored in the wp_options table
- Administrator sessions originating from unfamiliar IP addresses shortly after visiting external links
- Outbound HTTP requests from admin browsers to attacker-controlled domains when loading plugin pages
Detection Strategies
- Audit wp_options and plugin-specific tables for entries containing HTML or JavaScript syntax in Copyscape Premium settings
- Inspect web server access logs for POST requests to Copyscape Premium endpoints lacking a valid referer or originating cross-origin
- Deploy a Web Application Firewall (WAF) rule set that flags requests carrying script tags or javascript: URIs to WordPress admin endpoints
Monitoring Recommendations
- Enable WordPress audit logging to capture changes to plugin settings and the user account performing each change
- Monitor administrator browser sessions for anomalous DOM activity using Content Security Policy (CSP) violation reports
- Alert on creation of new administrator accounts or modification of user roles following plugin configuration changes
How to Mitigate CVE-2024-47644
Immediate Actions Required
- Deactivate the Copyscape Premium plugin until a vendor-supplied patch is verified and installed
- Review existing plugin configuration values and purge any entries containing executable script content
- Force a password reset and session invalidation for all WordPress administrator accounts
Patch Information
As of the latest NVD update, no fixed version has been published for Copyscape Premium beyond 1.3.9. Monitor the Patchstack advisory and the official plugin repository for an updated release that introduces nonce validation and output escaping.
Workarounds
- Restrict access to the WordPress admin interface using IP allowlists or VPN-only access
- Apply a strict Content Security Policy that disallows inline scripts on /wp-admin/ pages to limit XSS payload execution
- Use a WAF with WordPress-specific rules to block CSRF-style submissions missing valid nonces
# Configuration example: Apache CSP header for wp-admin
<LocationMatch "^/wp-admin/">
Header set Content-Security-Policy "default-src 'self'; script-src 'self'; object-src 'none'; base-uri 'self'"
Header set X-Frame-Options "SAMEORIGIN"
Header set X-Content-Type-Options "nosniff"
</LocationMatch>
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
