CVE-2025-59111
📋 TL;DR
Windu CMS version 4.1 has a broken access control vulnerability in user editing functionality that allows privileged users to delete Super Admin accounts via GET requests, bypassing GUI restrictions. This affects all Windu CMS 4.1 installations before build 2250. Attackers with existing user accounts can escalate privileges by removing administrative oversight.
💻 Affected Systems
- Windu CMS
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete compromise of CMS administration through removal of all Super Admin accounts, allowing attacker to take full control of the CMS and potentially the underlying server.
Likely Case
Privileged users deleting Super Admin accounts to remove oversight and gain unrestricted administrative access to the CMS.
If Mitigated
Limited impact if proper access controls and monitoring are in place to detect unauthorized administrative changes.
🎯 Exploit Status
Exploitation requires authenticated user access and knowledge of the vulnerable endpoint. Simple GET request manipulation.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 4.1 build 2250
Vendor Advisory: https://windu.org
Restart Required: No
Instructions:
1. Backup current installation. 2. Download Windu CMS 4.1 build 2250 or later from official website. 3. Replace vulnerable files with patched version. 4. Verify user permissions are correctly configured.
🔧 Temporary Workarounds
Restrict User Management Access
allTemporarily restrict access to user management functionality to Super Admins only via web server configuration.
# Example Apache .htaccess
<Location /admin/users>
Require user superadmin1 superadmin2
</Location>
# Example Nginx
location /admin/users {
auth_basic "Restricted";
auth_basic_user_file /path/to/.htpasswd;
}
Web Application Firewall Rule
allBlock suspicious GET requests to user deletion endpoints.
# Example ModSecurity rule
SecRule REQUEST_URI "@contains /admin/users/delete" \
"id:1001,phase:1,deny,status:403,msg:'Blocked user deletion attempt'"
🧯 If You Can't Patch
- Implement strict access controls limiting user management to Super Admins only.
- Enable detailed logging of all user management actions and monitor for unauthorized deletions.
🔍 How to Verify
Check if Vulnerable:
Check Windu CMS version in admin panel or by examining source files. If version is 4.1 with build number lower than 2250, system is vulnerable.Check Version:
Check admin panel dashboard or examine /includes/version.php fileVerify Fix Applied:
After patching, verify version shows 4.1 build 2250 or higher. Test user deletion functionality to ensure Super Admin accounts cannot be deleted by non-Super Admin users.📡 Detection & Monitoring
Log Indicators:
- GET requests to /admin/users/delete endpoint with Super Admin user IDs
- Unauthorized user role changes in audit logs
- Multiple failed login attempts followed by user deletion events
Network Indicators:
- HTTP GET requests to user deletion endpoints from non-admin IP addresses
- Unusual pattern of user management requests
SIEM Query:
source="web_logs" AND (uri_path="/admin/users/delete" OR action="user_delete") AND user_role!="superadmin"