CVE-2025-13529
📋 TL;DR
The Unify WordPress plugin has an authorization bypass vulnerability that allows unauthenticated attackers to delete specific plugin options. This affects all WordPress sites running Unify plugin versions up to and including 3.4.9. Attackers can exploit this by sending specially crafted requests to vulnerable sites.
💻 Affected Systems
- WordPress Unify 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 delete critical plugin configuration options, potentially disabling functionality or causing service disruption for the Unify plugin.
Likely Case
Attackers delete plugin options, causing the Unify plugin to malfunction or revert to default settings, potentially breaking site functionality that depends on the plugin.
If Mitigated
With proper web application firewalls and input validation, exploitation attempts would be blocked, limiting impact to failed attack attempts.
🎯 Exploit Status
The vulnerability is simple to exploit via HTTP requests with the 'unify_plugin_downgrade' parameter. Public proof-of-concept code is available in vulnerability reports.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 3.5.0 or later
Vendor Advisory: https://plugins.trac.wordpress.org/browser/unify/trunk/Services/Hooks.php
Restart Required: No
Instructions:
1. Log into WordPress admin panel. 2. Navigate to Plugins → Installed Plugins. 3. Find Unify plugin. 4. Click 'Update Now' if update is available. 5. Alternatively, download version 3.5.0+ from WordPress plugin repository and manually update.
🔧 Temporary Workarounds
Web Application Firewall Rule
allBlock requests containing the 'unify_plugin_downgrade' parameter
WAF specific - configure rule to block requests with 'unify_plugin_downgrade' parameter
Disable Unify Plugin
linuxTemporarily disable the Unify plugin until patched
wp plugin deactivate unify
🧯 If You Can't Patch
- Implement a web application firewall to block requests with 'unify_plugin_downgrade' parameter
- Restrict access to the WordPress site using IP whitelisting or authentication requirements
🔍 How to Verify
Check if Vulnerable:
Check WordPress admin panel → Plugins → Unify version. If version is 3.4.9 or lower, system is vulnerable.Check Version:
wp plugin list --name=unify --field=versionVerify Fix Applied:
Verify Unify plugin version is 3.5.0 or higher in WordPress admin panel.📡 Detection & Monitoring
Log Indicators:
- HTTP requests containing 'unify_plugin_downgrade' parameter in access logs
- Unusual plugin option changes in WordPress debug logs
Network Indicators:
- HTTP POST/GET requests to WordPress site with 'unify_plugin_downgrade' parameter
SIEM Query:
source="web_access_logs" AND "unify_plugin_downgrade"