CVE-2025-3921
📋 TL;DR
The PeproDev Ultimate Profile Solutions WordPress plugin has an authentication bypass vulnerability that allows unauthenticated attackers to modify user metadata. This can be exploited to lock administrators out of their sites by setting their capabilities to zero. All WordPress sites using vulnerable plugin versions 1.9.1 through 7.5.2 are affected.
💻 Affected Systems
- PeproDev Ultimate Profile Solutions WordPress 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
Complete site takeover through administrator lockout followed by privilege escalation or data destruction.
Likely Case
Administrator account lockout leading to business disruption and potential data compromise.
If Mitigated
Limited impact if proper network segmentation and monitoring are in place.
🎯 Exploit Status
Simple HTTP POST request to vulnerable endpoint with minimal technical skill required.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 7.5.3 or later
Vendor Advisory: https://wordpress.org/plugins/peprodev-ups/#developers
Restart Required: No
Instructions:
1. Log into WordPress admin panel. 2. Navigate to Plugins. 3. Find PeproDev Ultimate Profile Solutions. 4. Click 'Update Now' or manually update to version 7.5.3+. 5. Verify plugin is updated.
🔧 Temporary Workarounds
Disable Plugin
allTemporarily disable the vulnerable plugin until patched.
wp plugin deactivate peprodev-ups
Block Vulnerable Endpoint
linuxBlock access to the vulnerable AJAX endpoint via web server configuration.
# Apache: <LocationMatch "handel_ajax_req"> Deny from all </LocationMatch>
# Nginx: location ~* handel_ajax_req { deny all; }
🧯 If You Can't Patch
- Implement web application firewall (WAF) rules to block requests to the vulnerable endpoint.
- Enable strict user privilege monitoring and alert on unusual metadata changes.
🔍 How to Verify
Check if Vulnerable:
Check WordPress admin panel > Plugins > PeproDev Ultimate Profile Solutions version number.Check Version:
wp plugin list --name=peprodev-ups --field=versionVerify Fix Applied:
Confirm plugin version is 7.5.3 or higher in WordPress admin panel.📡 Detection & Monitoring
Log Indicators:
- HTTP POST requests to /wp-admin/admin-ajax.php with action=handel_ajax_req
- Unusual user metadata modifications in WordPress logs
Network Indicators:
- POST requests to admin-ajax.php with suspicious user ID parameters
SIEM Query:
source="wordpress.log" AND "handel_ajax_req" AND ("wp_capabilities" OR "user_meta")