CVE-2025-25796
📋 TL;DR
SeaCMS v13.3 contains a remote code execution vulnerability in admin_template.php that allows attackers to execute arbitrary code on affected systems. This affects all SeaCMS v13.3 installations with default configurations. Attackers can potentially take full control of vulnerable servers.
💻 Affected Systems
- SeaCMS
📦 What is this software?
Seacms by Seacms
⚠️ Risk & Real-World Impact
Worst Case
Complete server compromise allowing data theft, malware deployment, and use as attack platform
Likely Case
Website defacement, data exfiltration, and backdoor installation
If Mitigated
Limited impact if proper network segmentation and access controls are implemented
🎯 Exploit Status
Exploit requires admin credentials but is trivial to execute once authenticated
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: Not available
Restart Required: No
Instructions:
No official patch available. Consider upgrading to latest version if available or implementing workarounds.
🔧 Temporary Workarounds
Restrict admin_template.php access
allBlock access to vulnerable component via web server configuration
# Apache: RewriteRule ^admin_template\.php$ - [F,L]
# Nginx: location ~ admin_template\.php { deny all; }
Remove vulnerable file
linuxDelete or rename admin_template.php if not needed
rm admin_template.php
mv admin_template.php admin_template.php.disabled
🧯 If You Can't Patch
- Implement strict access controls to admin panel with strong authentication
- Deploy web application firewall with RCE protection rules
🔍 How to Verify
Check if Vulnerable:
Check if admin_template.php exists in SeaCMS installation directory and version is 13.3Check Version:
grep -r 'version.*13\.3' SeaCMS/ or check version.php fileVerify Fix Applied:
Verify admin_template.php is inaccessible or removed, and test for RCE attempts📡 Detection & Monitoring
Log Indicators:
- Unusual POST requests to admin_template.php
- Suspicious PHP code execution in logs
- Multiple failed admin login attempts
Network Indicators:
- HTTP requests with shell commands in parameters
- Outbound connections from web server to unknown IPs
SIEM Query:
source="web_logs" AND (uri="*admin_template.php*" AND (method="POST" OR params="*system*" OR params="*exec*"))