CVE-2024-50808
📋 TL;DR
SeaCms 13.1 contains a code injection vulnerability in the admin notification module that allows authenticated backend users to execute arbitrary code. This affects administrators with access to the backend user management interface. Successful exploitation could lead to complete system compromise.
💻 Affected Systems
- SeaCms
📦 What is this software?
Seacms by Seacms
⚠️ Risk & Real-World Impact
Worst Case
Remote code execution leading to full server takeover, data exfiltration, and lateral movement within the network.
Likely Case
Authenticated attackers gaining shell access to the web server, potentially compromising the CMS database and files.
If Mitigated
Limited impact if proper input validation and output encoding are implemented, restricting code execution to web server context only.
🎯 Exploit Status
Exploitation requires backend admin access. Public proof-of-concept demonstrates code injection via the 'notify' parameter.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: http://seacms.com
Restart Required: No
Instructions:
1. Check SeaCms website for security updates. 2. Apply any available patches. 3. Validate fix by testing the vulnerable endpoint.
🔧 Temporary Workarounds
Input Validation and Sanitization
allImplement strict input validation and output encoding for the 'notify' parameter in admin_notify.php
Access Restriction
allRestrict access to admin_notify.php to only necessary administrative users
🧯 If You Can't Patch
- Implement web application firewall rules to block suspicious 'notify' parameter values
- Disable or remove the vulnerable notification module if not required
🔍 How to Verify
Check if Vulnerable:
Review admin_notify.php for unsafe handling of the 'notify' parameter without proper validation/sanitizationCheck Version:
Check SeaCms version in admin panel or configuration filesVerify Fix Applied:
Test the notification endpoint with malicious payloads to confirm code execution is prevented📡 Detection & Monitoring
Log Indicators:
- Unusual POST requests to admin_notify.php with suspicious 'notify' parameter values
- Web server logs showing code execution attempts
Network Indicators:
- HTTP requests containing PHP code or system commands in parameters
SIEM Query:
source="web_logs" AND uri="*admin_notify.php*" AND (param="*notify*" AND value="*system(*" OR value="*exec(*" OR value="*eval(*")