CVE-2025-9415
📋 TL;DR
This vulnerability in GreenCMS allows attackers to upload arbitrary files without restrictions via the /index.php?m=admin&c=media&a=fileconnect endpoint. This could lead to remote code execution or server compromise. Only unsupported versions of GreenCMS up to 2.3.0603 are affected.
💻 Affected Systems
- GreenCMS
📦 What is this software?
Greencms by Njtech
⚠️ Risk & Real-World Impact
Worst Case
Complete server takeover via webshell upload leading to data theft, lateral movement, and persistent backdoor installation.
Likely Case
Webshell deployment enabling unauthorized access, data exfiltration, and further exploitation of the server environment.
If Mitigated
File upload attempts blocked or quarantined, with alerts generated for security monitoring.
🎯 Exploit Status
Exploit details are publicly available in GitHub issues and vulnerability databases.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: None - product is end-of-life
Vendor Advisory: None - vendor no longer supports product
Restart Required: No
Instructions:
No official patch available. Migrate to supported software or implement workarounds.
🔧 Temporary Workarounds
Block vulnerable endpoint
allUse web application firewall or server configuration to block access to /index.php?m=admin&c=media&a=fileconnect
# Apache: RewriteRule ^index\.php\?m=admin&c=media&a=fileconnect - [F]
# Nginx: location ~* /index\.php\?m=admin&c=media&a=fileconnect { return 403; }
Restrict file upload extensions
allConfigure server to only allow specific safe file extensions for uploads
# Example for Apache: <FilesMatch "\.(php|phtml|php3|php4|php5|phps|pl|py|jsp|asp|sh|cgi)$">
# Order Allow,Deny
# Deny from all
# </FilesMatch>
🧯 If You Can't Patch
- Migrate to alternative, supported content management system
- Isolate vulnerable system in segmented network with strict access controls
🔍 How to Verify
Check if Vulnerable:
Check GreenCMS version in admin panel or configuration files. If version is 2.3.0603 or earlier, system is vulnerable.Check Version:
Check GreenCMS version in /config/version.php or admin dashboardVerify Fix Applied:
Test file upload functionality at /index.php?m=admin&c=media&a=fileconnect with malicious file extensions. Upload should be blocked.📡 Detection & Monitoring
Log Indicators:
- POST requests to /index.php?m=admin&c=media&a=fileconnect with unusual file extensions
- File uploads with .php, .phtml, .jsp, or other executable extensions
Network Indicators:
- Unusual outbound connections from web server after file upload
- HTTP requests to known webshell paths
SIEM Query:
source="web_logs" AND (uri="/index.php?m=admin&c=media&a=fileconnect" AND method="POST") AND (file_extension="php" OR file_extension="phtml" OR file_extension="jsp")