CVE-2025-65806
📋 TL;DR
This vulnerability in E-POINT CMS allows attackers to upload nested ZIP archives containing executable files like webshells. When extracted, these files can be placed in web-accessible directories, potentially leading to remote code execution. All users of affected E-POINT CMS versions are at risk.
💻 Affected Systems
- E-POINT CMS
📦 What is this software?
E Point Cms by E Point
⚠️ Risk & Real-World Impact
Worst Case
Full system compromise via remote code execution, data exfiltration, and lateral movement within the network.
Likely Case
Webshell deployment leading to data theft, defacement, or further exploitation of the web server.
If Mitigated
Limited impact with proper file upload restrictions and web directory permissions.
🎯 Exploit Status
Simple file upload with nested ZIP structure, no authentication required.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Not available
Vendor Advisory: https://www.e-point.pl/produkty/e-point-cms
Restart Required: No
Instructions:
1. Monitor vendor website for security updates. 2. Apply patch when available. 3. Test in staging environment before production deployment.
🔧 Temporary Workarounds
Disable file upload feature
allTemporarily disable the vulnerable file upload functionality in E-POINT CMS
# Configuration change in CMS admin panel or code modification
Implement file type restrictions
allConfigure web server or application to block ZIP file uploads
# Add to .htaccess for Apache:
<FilesMatch "\.(zip|ZIP)$">
Order Allow,Deny
Deny from all
</FilesMatch>
# Nginx config: location ~ \.(zip|ZIP)$ { deny all; }
🧯 If You Can't Patch
- Implement Web Application Firewall (WAF) rules to block nested archive uploads
- Restrict web server permissions to prevent execution of uploaded files
🔍 How to Verify
Check if Vulnerable:
Test by uploading a nested ZIP archive containing a test file and checking if it extracts to web directoryCheck Version:
Check CMS admin panel or configuration files for version informationVerify Fix Applied:
Attempt the same nested ZIP upload test after applying mitigations📡 Detection & Monitoring
Log Indicators:
- Multiple file upload attempts with ZIP extensions
- Unusual file extraction activity in web directories
- POST requests to file upload endpoints with large payloads
Network Indicators:
- HTTP POST requests with ZIP file uploads to CMS endpoints
- Unusual outbound connections from web server
SIEM Query:
source="web_logs" AND (uri_path="/upload" OR uri_path="/file/upload") AND (file_extension="zip" OR content_type="application/zip")