CVE-2025-65094
📋 TL;DR
This vulnerability allows low-privileged users in WBCE CMS to escalate their privileges to full administrative access by manipulating the groups[] parameter in user update requests. Server-side validation is missing, enabling attackers to overwrite their group membership and compromise the entire CMS. All WBCE CMS installations prior to version 1.6.4 are affected.
💻 Affected Systems
- WBCE CMS
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete compromise of the CMS with administrative access, allowing data theft, defacement, backdoor installation, and further network penetration.
Likely Case
Privilege escalation leading to unauthorized administrative control, content manipulation, and potential data exfiltration.
If Mitigated
Limited impact with proper access controls, monitoring, and network segmentation preventing lateral movement.
🎯 Exploit Status
Exploitation requires authenticated low-privileged access and involves simple parameter manipulation.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 1.6.4
Vendor Advisory: https://github.com/WBCE/WBCE_CMS/security/advisories/GHSA-hmmw-4ccm-fx44
Restart Required: No
Instructions:
1. Backup your WBCE CMS installation and database. 2. Download version 1.6.4 from the official repository. 3. Replace all files with the new version. 4. Verify the update completed successfully.
🔧 Temporary Workarounds
Temporary access restriction
allRestrict access to /admin/users/save.php endpoint to administrators only via web server configuration.
# Apache: add to .htaccess
<Files "save.php">
Require group administrators
</Files>
# Nginx: add to server block
location ~ /admin/users/save\.php$ {
allow 192.168.1.0/24; # restrict to admin IPs
deny all;
}
🧯 If You Can't Patch
- Implement strict network segmentation to isolate WBCE CMS from critical systems.
- Enforce principle of least privilege by minimizing low-privileged user accounts and monitoring their activity.
🔍 How to Verify
Check if Vulnerable:
Check if WBCE CMS version is below 1.6.4 by examining the version file or admin interface.Check Version:
cat /path/to/wbce/info.php | grep 'WBCE Version'Verify Fix Applied:
After updating, confirm version is 1.6.4 or higher and test that low-privileged users cannot modify their group membership.📡 Detection & Monitoring
Log Indicators:
- POST requests to /admin/users/save.php with modified groups[] parameter from non-admin users
- User privilege changes in audit logs
Network Indicators:
- Unusual administrative activity from previously low-privileged user accounts
SIEM Query:
source="web_logs" AND url="/admin/users/save.php" AND user_role!="admin" AND POST_data CONTAINS "groups[]"