CVE-2024-55086
📋 TL;DR
This SSRF vulnerability in GetSimple CMS CE 3.3.19 allows attackers to make the server send requests to internal systems through the plugin download functionality in the admin panel. It affects administrators with access to the backend management system. The vulnerability could lead to internal network reconnaissance or attacks on internal services.
💻 Affected Systems
- GetSimple CMS CE
📦 What is this software?
Getsimple Cms by Getsimple Ce
⚠️ Risk & Real-World Impact
Worst Case
Attackers could access internal services, exfiltrate sensitive data from internal systems, or pivot to attack other internal infrastructure.
Likely Case
Internal network scanning, accessing metadata services, or interacting with internal APIs that shouldn't be exposed.
If Mitigated
Limited to internal network reconnaissance if proper network segmentation and egress filtering are in place.
🎯 Exploit Status
Exploitation requires admin credentials but is straightforward once authenticated.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: https://getsimple-ce.ovh/
Restart Required: No
Instructions:
No official patch available. Monitor vendor site for updates.
🔧 Temporary Workarounds
Restrict Admin Access
allLimit admin panel access to trusted IP addresses only
Configure web server (Apache/Nginx) to restrict /admin/ path to specific IPs
Network Egress Filtering
allBlock outbound requests from web server to internal networks
Configure firewall to restrict web server outbound connections
🧯 If You Can't Patch
- Implement strict network segmentation to isolate the CMS server
- Monitor for unusual outbound connections from the web server
🔍 How to Verify
Check if Vulnerable:
Check if running GetSimple CMS CE version 3.3.19 with admin access to plugin managementCheck Version:
Check GetSimple CMS version in admin panel or read version fileVerify Fix Applied:
Test if plugin download functionality can make requests to internal IPs📡 Detection & Monitoring
Log Indicators:
- Unusual outbound HTTP requests from web server
- Multiple failed plugin download attempts
Network Indicators:
- Web server making requests to internal IP ranges
- Requests to metadata services (169.254.169.254)
SIEM Query:
source_ip=webserver AND dest_ip IN (internal_ranges) AND protocol=HTTP