CVE-2025-40662
📋 TL;DR
An absolute path disclosure vulnerability in DM Corporative CMS allows attackers to view webroot file contents by accessing non-existent files. This exposes internal server paths and potentially sensitive information. All users of vulnerable DM Corporative CMS versions are affected.
💻 Affected Systems
- DM Corporative CMS
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Attackers could map the server structure, discover sensitive files, and use path information for further attacks like directory traversal or file inclusion.
Likely Case
Attackers will obtain internal server path information which can aid in reconnaissance for more serious attacks against the web application.
If Mitigated
With proper web application firewalls and input validation, the impact is limited to information disclosure without direct system compromise.
🎯 Exploit Status
Exploitation requires no authentication and involves simple HTTP requests to non-existent files. The vulnerability is easy to discover and exploit.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Check vendor advisory for specific patched version
Vendor Advisory: https://www.incibe.es/en/incibe-cert/notices/aviso/multiple-vulnerabilities-dm-corporative-cms-dmacroweb
Restart Required: No
Instructions:
1. Review the vendor advisory for patched version. 2. Update DM Corporative CMS to the latest secure version. 3. Verify the fix by testing for the vulnerability.
🔧 Temporary Workarounds
Web Application Firewall Rule
allConfigure WAF to block requests that trigger path disclosure or access non-existent files with specific patterns
Error Page Customization
allConfigure custom error pages that don't reveal path information in error messages
🧯 If You Can't Patch
- Implement strict input validation to prevent access to non-existent files
- Configure web server to suppress detailed error messages for 404 responses
🔍 How to Verify
Check if Vulnerable:
Access a non-existent file on the DM Corporative CMS instance and check if the response reveals absolute server pathsCheck Version:
Check CMS admin panel or configuration files for version informationVerify Fix Applied:
After patching, attempt to access non-existent files and verify that no path information is disclosed in error responses📡 Detection & Monitoring
Log Indicators:
- Multiple 404 errors for non-existent files
- Requests to unusual file paths
- Error logs containing full server paths
Network Indicators:
- HTTP 404 responses containing absolute paths
- Repeated requests to non-existent file extensions
SIEM Query:
http.status_code=404 AND http.uri CONTAINS ".php" OR http.uri CONTAINS ".asp" AND http.response_body CONTAINS "/var/www/" OR http.response_body CONTAINS "C:\\"