CVE-2025-0763
📋 TL;DR
This vulnerability in the Ultimate Classified Listings WordPress plugin allows authenticated attackers with Subscriber-level access or higher to modify plugin custom fields without proper authorization. It affects all WordPress sites using this plugin up to version 1.6. The issue stems from missing capability checks in the save_custom_fields function.
💻 Affected Systems
- Ultimate Classified Listings 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
Attackers could modify critical plugin settings, potentially altering classified listing functionality, injecting malicious content, or disrupting business operations.
Likely Case
Malicious users could tamper with classified listing fields, modify pricing, change contact information, or alter other plugin-specific data.
If Mitigated
With proper user role management and monitoring, impact would be limited to authorized changes only.
🎯 Exploit Status
Exploitation requires authenticated access and knowledge of plugin endpoints. No public exploit code is currently available.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Version after 1.6
Vendor Advisory: https://plugins.trac.wordpress.org/browser/ultimate-classified-listings
Restart Required: No
Instructions:
1. Log into WordPress admin panel. 2. Navigate to Plugins > Installed Plugins. 3. Find Ultimate Classified Listings. 4. Click 'Update Now' if available. 5. If no update appears, manually download latest version from WordPress repository and replace plugin files.
🔧 Temporary Workarounds
Temporary Plugin Deactivation
WordPressDisable the vulnerable plugin until patched
wp plugin deactivate ultimate-classified-listings
User Role Restriction
WordPress CLITemporarily restrict Subscriber and Contributor roles from accessing the site
wp user list --role=subscriber --field=ID | xargs wp user set-role {ID} none
🧯 If You Can't Patch
- Remove the Ultimate Classified Listings plugin entirely and use alternative classified listing solutions.
- Implement strict user role management and monitor all authenticated user activity for suspicious plugin modifications.
🔍 How to Verify
Check if Vulnerable:
Check WordPress admin panel > Plugins > Ultimate Classified Listings. If version is 1.6 or lower, you are vulnerable.Check Version:
wp plugin get ultimate-classified-listings --field=versionVerify Fix Applied:
After updating, verify plugin version is higher than 1.6 in WordPress admin plugins page.📡 Detection & Monitoring
Log Indicators:
- Unusual POST requests to /wp-admin/admin-ajax.php with action=save_custom_fields
- Multiple failed authentication attempts followed by successful Subscriber logins
- Unexpected modifications to wp_options table with ultimate_classified_ prefix
Network Indicators:
- HTTP POST requests containing ultimate-classified-listings parameters from non-admin users
- Unusual traffic patterns to plugin-specific admin endpoints
SIEM Query:
source="wordpress.log" AND (uri_path="/wp-admin/admin-ajax.php" AND post_data CONTAINS "save_custom_fields") AND user_role="subscriber"