CVE-2022-31854
📋 TL;DR
CVE-2022-31854 is an arbitrary file upload vulnerability in Codoforum v5.1 that allows authenticated administrators to upload malicious files via the logo change feature. This can lead to remote code execution on the server. Only Codoforum v5.1 installations with admin access are affected.
💻 Affected Systems
- Codoforum
📦 What is this software?
Codoforum by Codologic
⚠️ Risk & Real-World Impact
Worst Case
Full server compromise allowing attackers to execute arbitrary code, steal data, install backdoors, or pivot to other systems.
Likely Case
Webshell deployment leading to data theft, defacement, or further exploitation of the server.
If Mitigated
Limited impact with proper file upload restrictions and admin access controls in place.
🎯 Exploit Status
Exploit requires admin credentials; Python exploit script is publicly available.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: v5.2 or later
Vendor Advisory: https://codoforum.com
Restart Required: No
Instructions:
1. Backup your Codoforum installation and database. 2. Download the latest version from codoforum.com. 3. Replace all files except config.php and uploads directory. 4. Run any database update scripts if provided.
🔧 Temporary Workarounds
Restrict Admin Panel Access
allLimit access to the admin panel to trusted IP addresses only.
# Example for Apache: RewriteEngine On
RewriteCond %{REMOTE_ADDR} !^192\.168\.1\.
RewriteRule ^admin/ - [F,L]
# Example for Nginx: location /admin { allow 192.168.1.0/24; deny all; }
File Upload Restrictions
allImplement server-side file type validation and restrict upload directories.
# Example PHP restriction: $allowed_types = ['image/jpeg', 'image/png'];
# Web server config to prevent execution in uploads: location /uploads { deny all; }
🧯 If You Can't Patch
- Disable the logo upload feature in admin panel code.
- Implement strict WAF rules to block file uploads with executable extensions.
🔍 How to Verify
Check if Vulnerable:
Check if Codoforum version is 5.1 by viewing the admin panel footer or config files.Check Version:
grep -r 'version' /path/to/codoforum/ | grep -i '5.1'Verify Fix Applied:
Verify version is updated to 5.2+ and test logo upload with non-image files to ensure they are rejected.📡 Detection & Monitoring
Log Indicators:
- Unusual file uploads to logo directory
- Admin panel access from unexpected IPs
- POST requests to admin upload endpoints with non-image files
Network Indicators:
- HTTP POST requests to /admin/upload-logo with executable file extensions
- Subsequent requests to uploaded files in uploads directory
SIEM Query:
source="web_logs" AND (uri_path="/admin/upload-logo" OR file_extension IN ("php", "jsp", "asp"))🔗 References
- http://packetstormsecurity.com/files/167782/CodoForum-5.1-Remote-Code-Execution.html
- https://codoforum.com
- https://github.com/Vikaran101/CVE-2022-31854/blob/main/exploit.py
- https://vikaran101.medium.com/codoforum-v5-1-authenticated-rce-my-first-cve-f49e19b8bc
- http://packetstormsecurity.com/files/167782/CodoForum-5.1-Remote-Code-Execution.html
- https://codoforum.com
- https://github.com/Vikaran101/CVE-2022-31854/blob/main/exploit.py
- https://vikaran101.medium.com/codoforum-v5-1-authenticated-rce-my-first-cve-f49e19b8bc
