CVE-2025-46520
📋 TL;DR
This vulnerability in the WordPress plugin 'Related Posts via Taxonomies' 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, which then inject persistent scripts into the website. This affects all WordPress sites using vulnerable versions of this plugin.
💻 Affected Systems
- WordPress Related Posts via Taxonomies plugin
⚠️ Manual Verification Required
This CVE does not have specific version information in our database, so automatic vulnerability detection cannot determine if your system is affected.
Why? The CVE database entry doesn't specify which versions are vulnerable (no version ranges provided by the vendor/NVD).
🔒 Custom verification scripts are available for registered users. Sign up free to download automated test scripts.
- Review the CVE details at NVD
- Check vendor security advisories for your specific version
- Test if the vulnerability is exploitable in your environment
- Consider updating to the latest version as a precaution
⚠️ Risk & Real-World Impact
Worst Case
Attackers could inject malicious JavaScript that steals administrator credentials, redirects users to malicious sites, or takes full control of the WordPress site when administrators view affected pages.
Likely Case
Attackers create fake admin interfaces or links that trick logged-in administrators into executing actions that inject malicious scripts into posts or pages, potentially compromising visitor data.
If Mitigated
With proper CSRF tokens and input validation, the attack chain would be broken at the initial CSRF stage, preventing the XSS payload from being stored.
🎯 Exploit Status
CSRF to XSS chain is well-understood attack pattern. Exploitation requires social engineering to trick authenticated users.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 1.0.2 or later
Restart Required: No
Instructions:
1. Log into WordPress admin panel. 2. Navigate to Plugins → Installed Plugins. 3. Find 'Related Posts via Taxonomies'. 4. Click 'Update Now' if available. 5. Alternatively, delete and reinstall latest version from WordPress repository.
🔧 Temporary Workarounds
Disable vulnerable plugin
allTemporarily disable the plugin until patched
wp plugin deactivate related-posts-via-taxonomies
Implement CSRF protection middleware
allAdd WordPress nonce verification to all plugin forms and actions
🧯 If You Can't Patch
- Disable the Related Posts via Taxonomies plugin completely
- Implement web application firewall rules to block suspicious POST requests to plugin endpoints
🔍 How to Verify
Check if Vulnerable:
Check WordPress admin → Plugins → Installed Plugins, find 'Related Posts via Taxonomies' and check if version is 1.0.1 or earlierCheck Version:
wp plugin get related-posts-via-taxonomies --field=versionVerify Fix Applied:
Verify plugin version is 1.0.2 or later in WordPress admin plugins page📡 Detection & Monitoring
Log Indicators:
- Unusual POST requests to /wp-admin/admin-ajax.php with plugin-specific actions
- Multiple failed nonce verification attempts
Network Indicators:
- POST requests containing suspicious JavaScript payloads in parameters
- Requests with missing or invalid _wpnonce parameters
SIEM Query:
source="wordpress.log" AND ("related-posts-via-taxonomies" OR "admin-ajax.php") AND (POST AND NOT _wpnonce=*)