CVE-2025-57899
📋 TL;DR
This CVE describes a missing authorization vulnerability in the WP Compress WordPress plugin that allows attackers to access functionality not properly constrained by access control lists. Attackers can exploit this to perform actions they shouldn't have permission for. This affects all WordPress sites using WP Compress versions up to 6.50.54.
💻 Affected Systems
- WP Compress Image Optimizer 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 plugin settings, potentially disabling security features, altering image optimization settings, or accessing administrative functions without proper authorization.
Likely Case
Unauthorized users could change plugin configurations, potentially affecting site performance or accessing functionality intended only for administrators.
If Mitigated
With proper network segmentation and least privilege principles, impact would be limited to the WordPress application layer only.
🎯 Exploit Status
Exploitation requires some WordPress knowledge but no authentication. The vulnerability is in access control mechanisms.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Version 6.50.55 or later
Restart Required: No
Instructions:
1. Log into WordPress admin panel. 2. Navigate to Plugins > Installed Plugins. 3. Find WP Compress Image Optimizer. 4. Click 'Update Now' if available. 5. Alternatively, download latest version from WordPress repository and manually update.
🔧 Temporary Workarounds
Temporary Plugin Deactivation
allDisable the WP Compress plugin until patched to prevent exploitation.
wp plugin deactivate wp-compress-image-optimizer
🧯 If You Can't Patch
- Implement strict network access controls to limit who can access the WordPress admin interface.
- Add web application firewall rules to detect and block unauthorized access attempts to WP Compress endpoints.
🔍 How to Verify
Check if Vulnerable:
Check WordPress admin panel > Plugins > Installed Plugins for WP Compress version. If version is 6.50.54 or lower, you are vulnerable.Check Version:
wp plugin get wp-compress-image-optimizer --field=versionVerify Fix Applied:
After updating, verify WP Compress version shows 6.50.55 or higher in WordPress plugins list.📡 Detection & Monitoring
Log Indicators:
- Unusual POST requests to /wp-admin/admin-ajax.php with wp_compress-related actions from unauthorized IPs
- Multiple failed authorization attempts followed by successful wp_compress actions
Network Indicators:
- HTTP requests to wp_compress endpoints from non-admin users
- Unusual traffic patterns to /wp-content/plugins/wp-compress-image-optimizer/
SIEM Query:
source="wordpress.log" AND (uri_path="/wp-admin/admin-ajax.php") AND (action="wp_compress_*") AND (user_role!="administrator")