CVE-2024-49220
📋 TL;DR
This vulnerability in the WordPress Cookie Scanner plugin allows attackers to perform Cross-Site Request Forgery (CSRF) attacks that lead to Stored Cross-Site Scripting (XSS). Attackers can trick authenticated administrators into executing malicious actions that inject persistent scripts into the website. All WordPress sites using vulnerable versions of the Cookie Scanner plugin are affected.
💻 Affected Systems
- WordPress Cookie Scanner plugin by Nikel Schubert
📦 What is this software?
Cookie Scanner by Cookie Scanner
⚠️ Risk & Real-World Impact
Worst Case
Complete site takeover through admin account compromise, data theft, malware distribution to visitors, and defacement.
Likely Case
Unauthorized script injection leading to session hijacking, credential theft from site visitors, and content manipulation.
If Mitigated
Limited impact with proper CSRF tokens and Content Security Policy (CSP) in place, though some risk remains.
🎯 Exploit Status
Exploitation requires tricking an authenticated user (typically admin) to click a malicious link. The CSRF leads to stored XSS payload injection.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 1.2 or later
Vendor Advisory: https://patchstack.com/database/vulnerability/cookie-scanner/wordpress-cookie-scanner-plugin-1-1-csrf-to-stored-xss-vulnerability?_s_id=cve
Restart Required: No
Instructions:
1. Log into WordPress admin panel. 2. Navigate to Plugins > Installed Plugins. 3. Find 'Cookie Scanner' plugin. 4. Click 'Update Now' if available. 5. If no update appears, manually download version 1.2+ from WordPress repository and replace files via FTP/SFTP.
🔧 Temporary Workarounds
Disable Plugin
allTemporarily deactivate the Cookie Scanner plugin until patched.
wp plugin deactivate cookie-scanner
Implement CSRF Protection
allAdd nonce verification to plugin forms if custom patching is possible.
Add wp_nonce_field() and wp_verify_nonce() calls in plugin PHP files
🧯 If You Can't Patch
- Restrict admin access to trusted networks only
- Implement strict Content Security Policy (CSP) headers to mitigate XSS impact
🔍 How to Verify
Check if Vulnerable:
Check WordPress admin > Plugins > Cookie Scanner. If version is 1.1 or lower, you are vulnerable.Check Version:
wp plugin get cookie-scanner --field=versionVerify Fix Applied:
Confirm plugin version is 1.2 or higher in WordPress admin panel.📡 Detection & Monitoring
Log Indicators:
- Unusual POST requests to wp-admin/admin-ajax.php with cookie-scanner actions
- Multiple failed nonce verification attempts
Network Indicators:
- HTTP requests with suspicious script tags in parameters
- Cross-origin requests to admin endpoints without referrer validation
SIEM Query:
source="wordpress.log" AND "cookie-scanner" AND ("admin-ajax" OR "wp-admin") AND ("script" OR "onerror" OR "javascript:")