CVE-2025-63678
📋 TL;DR
This vulnerability allows authenticated administrators in CMS Made Simple Foundation File Manager v2.2.22 to upload arbitrary PHP files via the /uploads/ endpoint, leading to remote code execution. Attackers with compromised admin credentials can take full control of affected systems. Organizations using this specific version are at risk.
💻 Affected Systems
- CMS Made Simple Foundation File Manager
📦 What is this software?
File Manager by Cmsmadesimple
⚠️ Risk & Real-World Impact
Worst Case
Complete system compromise with attacker gaining persistent access, data exfiltration, ransomware deployment, and lateral movement within the network.
Likely Case
Web server compromise leading to website defacement, data theft, or deployment of malware/backdoors on the affected system.
If Mitigated
Limited impact with proper file upload validation and admin credential protection, potentially only affecting the web application directory.
🎯 Exploit Status
Exploitation requires admin credentials but is straightforward once obtained. The PDF reference contains technical details.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: Unknown
Restart Required: No
Instructions:
1. Check for official patch from CMS Made Simple Foundation. 2. If available, download and apply according to vendor instructions. 3. Verify file upload restrictions are properly implemented.
🔧 Temporary Workarounds
Restrict File Upload Types
allConfigure the file manager to only allow specific non-executable file extensions
Modify file upload validation in the application configuration to reject .php, .phtml, .php5, .php7 extensions
Web Server File Execution Restriction
linuxConfigure web server to prevent execution of uploaded files
For Apache: Add 'php_flag engine off' to .htaccess in uploads directory
For Nginx: Add 'location ~ \.php$ { deny all; }' to uploads location block
🧯 If You Can't Patch
- Implement strict access controls for admin accounts with MFA and regular credential rotation
- Deploy WAF rules to block PHP file uploads to the /uploads/ endpoint
🔍 How to Verify
Check if Vulnerable:
Check if CMS Made Simple Foundation File Manager version 2.2.22 is installed and if the /uploads/ endpoint accepts PHP files with admin credentials.Check Version:
Check the file manager's configuration files or admin interface for version informationVerify Fix Applied:
Attempt to upload a PHP file with admin credentials - it should be rejected or saved without execution capability.📡 Detection & Monitoring
Log Indicators:
- PHP file uploads to /uploads/ endpoint
- Unusual admin login activity followed by file uploads
- Web server logs showing execution of uploaded PHP files
Network Indicators:
- HTTP POST requests to /uploads/ with PHP file content
- Subsequent requests to uploaded PHP files
SIEM Query:
source="web_logs" AND (uri_path="/uploads/" AND file_extension=".php") OR (uri_path CONTAINS "/uploads/" AND response_code=200 AND user_agent UNUSUAL)