CVE-2025-8213
📋 TL;DR
The NinjaScanner WordPress plugin contains an arbitrary file deletion vulnerability that allows authenticated attackers with Administrator privileges to delete any file on the server, including files outside the WordPress root directory. This affects all versions up to and including 3.2.5. The vulnerability exists in insufficient file path validation in two specific functions.
💻 Affected Systems
- NinjaScanner – Virus & Malware scan plugin for WordPress
⚠️ 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 server compromise through deletion of critical system files, leading to service disruption, data loss, or privilege escalation by deleting security controls.
Likely Case
Website defacement, data destruction, or deletion of WordPress configuration files causing site downtime.
If Mitigated
Limited impact if proper file permissions and least privilege principles are enforced, though authenticated administrators could still cause damage.
🎯 Exploit Status
Exploitation requires Administrator credentials but is technically simple once authenticated. The vulnerability is well-documented in public references.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 3.2.6 or later
Vendor Advisory: https://plugins.trac.wordpress.org/changeset/3336569/
Restart Required: No
Instructions:
1. Log into WordPress admin panel. 2. Navigate to Plugins → Installed Plugins. 3. Find NinjaScanner and click 'Update Now'. 4. Alternatively, download version 3.2.6+ from WordPress plugin repository and manually replace files.
🔧 Temporary Workarounds
Disable vulnerable plugin
allTemporarily deactivate NinjaScanner plugin until patched
wp plugin deactivate ninjascanner
Restrict file permissions
linuxSet strict file permissions on critical directories to prevent deletion
chmod 755 /var/www/html
chmod 644 /var/www/html/wp-config.php
🧯 If You Can't Patch
- Remove Administrator privileges from unnecessary users and implement principle of least privilege
- Implement file integrity monitoring on critical system files and WordPress directories
🔍 How to Verify
Check if Vulnerable:
Check WordPress admin panel → Plugins → NinjaScanner version. If version is 3.2.5 or lower, you are vulnerable.Check Version:
wp plugin get ninjascanner --field=versionVerify Fix Applied:
Verify NinjaScanner plugin version is 3.2.6 or higher in WordPress admin panel.📡 Detection & Monitoring
Log Indicators:
- Unusual file deletion events in WordPress logs
- Multiple failed login attempts followed by successful Administrator login
- POST requests to /wp-admin/admin-ajax.php with 'action' parameter containing 'nscan_ajax_quarantine' or 'nscan_quarantine_select'
Network Indicators:
- Unusual outbound connections from WordPress server following file deletions
- Spike in admin-ajax.php requests from single IP
SIEM Query:
source="wordpress.log" AND ("nscan_ajax_quarantine" OR "nscan_quarantine_select") AND status=200🔗 References
- https://plugins.trac.wordpress.org/browser/ninjascanner/trunk/lib/ajax_hooks.php#L331
- https://plugins.trac.wordpress.org/browser/ninjascanner/trunk/lib/tab_quarantine.php#L114
- https://plugins.trac.wordpress.org/changeset/3336569/
- https://www.wordfence.com/threat-intel/vulnerabilities/id/6b1da345-ddbb-48ad-b0c1-bb0cb3b0fc69?source=cve
