CVE-2024-55088
📋 TL;DR
GetSimple CMS CE 3.3.19 contains a Server-Side Request Forgery (SSRF) vulnerability in its backend plugin module. This allows authenticated attackers to make arbitrary HTTP requests from the server, potentially accessing internal systems. Only administrators with backend access are affected.
💻 Affected Systems
- GetSimple CMS CE
📦 What is this software?
Getsimple Cms by Getsimple Ce
⚠️ Risk & Real-World Impact
Worst Case
Attackers could pivot to internal networks, access cloud metadata services, perform port scanning, or interact with internal APIs to steal data or execute further attacks.
Likely Case
Attackers with admin credentials could probe internal networks, access internal web services, or use the server as a proxy for malicious requests.
If Mitigated
With proper network segmentation and egress filtering, impact is limited to the server itself and directly accessible internal services.
🎯 Exploit Status
Exploitation requires admin credentials but is straightforward once authenticated.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Not available
Vendor Advisory: https://getsimple-ce.ovh/
Restart Required: No
Instructions:
1. Monitor the official GetSimple CMS CE website for updates. 2. Apply any security patches when released. 3. Consider temporary workarounds until patch is available.
🔧 Temporary Workarounds
Restrict Admin Access
allLimit backend access to trusted IP addresses only
# Configure web server (Apache example)
<Location "/admin/plugins/">
Require ip 192.168.1.0/24
</Location>
Disable Plugin Module
linuxTemporarily disable or restrict the vulnerable plugin module
# Rename or move the plugins directory
mv /path/to/getsimple/admin/plugins /path/to/getsimple/admin/plugins_disabled
🧯 If You Can't Patch
- Implement strict network egress filtering to limit outbound connections from the web server
- Deploy a web application firewall (WAF) with SSRF protection rules
🔍 How to Verify
Check if Vulnerable:
Check if running GetSimple CMS CE version 3.3.19 and verify admin access to plugin moduleCheck Version:
Check the version.txt file in the GetSimple installation directoryVerify Fix Applied:
Verify version is updated beyond 3.3.19 or workarounds are properly implemented📡 Detection & Monitoring
Log Indicators:
- Unusual outbound HTTP requests from web server process
- Multiple requests to internal IP addresses from admin user sessions
Network Indicators:
- Web server making unexpected outbound HTTP requests
- Requests to internal services from external-facing server
SIEM Query:
source="webserver.log" AND (dest_ip=10.0.0.0/8 OR dest_ip=172.16.0.0/12 OR dest_ip=192.168.0.0/16) AND user="admin"