CVE-2024-55085
📋 TL;DR
GetSimple CMS CE 3.3.19 has a critical vulnerability in its template editing function that allows authenticated attackers to execute arbitrary code on the server. This affects all installations running version 3.3.19 of GetSimple CMS CE. Attackers with admin access can achieve remote code execution through template manipulation.
💻 Affected Systems
- GetSimple CMS CE
📦 What is this software?
Getsimple Cms by Getsimple Ce
⚠️ Risk & Real-World Impact
Worst Case
Complete server compromise allowing attacker to install malware, steal data, pivot to other systems, or establish persistent backdoor access.
Likely Case
Attacker gains shell access to the web server, can deface websites, install cryptocurrency miners, or steal sensitive data from the database.
If Mitigated
With proper access controls and network segmentation, impact limited to the web application directory and database.
🎯 Exploit Status
Exploitation requires admin credentials. The vulnerability is in template editing functionality where malicious code can be injected.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Not available
Vendor Advisory: Not available
Restart Required: No
Instructions:
No official patch available. Consider upgrading to a different CMS or implementing workarounds.
🔧 Temporary Workarounds
Disable template editing
allRemove or restrict access to template editing functionality in admin panel
# Remove template editing permissions from admin users
# Disable template.php or related files
Restrict admin access
linuxImplement IP whitelisting for admin panel and enforce strong authentication
# Add to .htaccess for Apache:
Order Deny,Allow
Deny from all
Allow from 192.168.1.0/24
# Or use firewall rules
🧯 If You Can't Patch
- Implement web application firewall (WAF) rules to block template editing requests containing suspicious patterns
- Isolate the CMS server in a DMZ with strict outbound firewall rules and monitor for unusual process execution
🔍 How to Verify
Check if Vulnerable:
Check CMS version in admin panel or by examining version files. If running GetSimple CMS CE 3.3.19, you are vulnerable.Check Version:
Check admin panel dashboard or examine includes/version.php fileVerify Fix Applied:
Verify template editing functionality is disabled or restricted. Test with legitimate admin credentials that template editing no longer works.📡 Detection & Monitoring
Log Indicators:
- Unusual template file modifications
- Admin panel access from unexpected IPs
- POST requests to template editing endpoints with suspicious content
Network Indicators:
- Outbound connections from web server to unknown IPs
- Unusual process execution patterns from web server
SIEM Query:
source="web_logs" AND (uri="/admin/template.php" OR uri CONTAINS "template") AND (method="POST" OR method="PUT") AND size>1000