CVE-2024-53728: Protect Your Content CSRF Vulnerability

CVE-2024-53728 Overview

CVE-2024-53728 is a Cross-Site Request Forgery (CSRF) vulnerability [CWE-352] in the Oliver Lindner Protect Your Content WordPress plugin. The flaw affects all versions up to and including 1.0.2. An attacker who tricks an authenticated administrator into visiting a malicious page can forge requests to the plugin and inject persistent JavaScript. The injected payload is stored and later rendered to users, resulting in Stored Cross-Site Scripting (XSS). Exploitation requires user interaction but no privileges on the target site.

Critical Impact

Successful exploitation lets attackers execute arbitrary script in administrator browsers, hijack sessions, modify site content, and pivot to further compromise of the WordPress instance.

Affected Products

• Oliver Lindner Protect Your Content plugin for WordPress
• All versions from initial release through 1.0.2
• WordPress sites running the protect-your-content plugin

Discovery Timeline

• 2024-12-02 - CVE-2024-53728 published to the National Vulnerability Database (NVD)
• 2026-04-23 - Last updated in NVD database

Technical Details for CVE-2024-53728

Vulnerability Analysis

The vulnerability combines two weaknesses in the protect-your-content plugin. The plugin exposes state-changing actions without validating anti-CSRF tokens, and it stores administrator-supplied input without proper output encoding. An attacker hosts a crafted page that submits a forged request to the target WordPress site. If an authenticated administrator visits the attacker page, the browser sends the request with valid session cookies. The plugin processes the request and persists attacker-controlled content, which later executes as script in the context of the WordPress origin.

The combined CSRF-to-Stored-XSS chain elevates the impact beyond a simple state-changing CSRF. Stored payloads execute on every subsequent page load, exposing all viewers, including administrators, to script execution.

Root Cause

The plugin fails to verify request authenticity using WordPress nonces or equivalent anti-CSRF tokens on sensitive endpoints. It also lacks server-side sanitization and contextual output encoding of stored values, allowing HTML and JavaScript payloads to persist and render.

Attack Vector

Exploitation is network-based and requires victim interaction. The attacker must persuade an authenticated WordPress administrator to load a malicious URL or page. The forged request writes attacker-controlled content into the plugin's persistent storage. When any user later visits a page that renders that content, the browser executes the injected JavaScript under the site's origin.

No authentication is required from the attacker because the victim's browser supplies the session. Refer to the Patchstack Vulnerability Advisory for technical details.

Detection Methods for CVE-2024-53728

Indicators of Compromise

• Unexpected <script> tags, event handlers, or obfuscated JavaScript stored in plugin-managed content or options
• WordPress access logs showing POST requests to protect-your-content endpoints with external Referer headers
• New or modified administrator accounts created shortly after an admin session
• Outbound browser connections to unfamiliar domains when loading pages protected by the plugin

Detection Strategies

• Audit the wp_options table and plugin-specific storage for HTML or JavaScript content where plain text is expected
• Review web server access logs for state-changing requests to the plugin lacking valid _wpnonce parameters
• Scan rendered pages with a headless browser to identify unexpected script execution from plugin-rendered fields

Monitoring Recommendations

• Alert on administrator account changes, plugin setting modifications, and new user registrations following admin web sessions
• Enable a Content Security Policy (CSP) in report-only mode to surface inline script violations originating from plugin content
• Monitor WordPress audit logs for changes to plugin options by sessions with anomalous referrers or geolocation

How to Mitigate CVE-2024-53728

Immediate Actions Required

• Identify all WordPress sites running the Protect Your Content plugin at version 1.0.2 or earlier
• Deactivate and remove the plugin until a fixed version is confirmed by the vendor
• Force a logout of all administrator sessions and rotate administrator credentials
• Inspect plugin-stored content and remove any unauthorized HTML or JavaScript payloads

Patch Information

No fixed version is identified in the available advisory data. The vulnerability affects all releases through 1.0.2. Site operators should monitor the Patchstack Vulnerability Advisory and the plugin's WordPress.org page for an updated release.

Workarounds

• Remove the protect-your-content plugin and replace it with a maintained alternative
• Restrict access to /wp-admin by IP allow-listing or VPN to reduce CSRF exposure
• Deploy a web application firewall (WAF) rule that requires a valid _wpnonce on plugin endpoints
• Apply a strict Content Security Policy that disallows inline scripts on WordPress pages

# Configuration example: restrict wp-admin and enforce CSP via Nginx
location ^~ /wp-admin/ {
    allow 203.0.113.0/24;   # trusted admin network
    deny all;
}

add_header Content-Security-Policy "default-src 'self'; script-src 'self'; object-src 'none'; base-uri 'self'" always;