CVE-2025-65836
📋 TL;DR
PublicCMS V5.202506.b contains a Server-Side Request Forgery (SSRF) vulnerability in the chat interface of SimpleAiAdminController. This allows attackers to make unauthorized requests to internal systems from the vulnerable server. Any organization using this specific version of PublicCMS with the chat interface enabled is affected.
💻 Affected Systems
- PublicCMS
📦 What is this software?
Publiccms by Publiccms
⚠️ Risk & Real-World Impact
Worst Case
Attackers could access internal services, exfiltrate sensitive data, or pivot to attack other internal systems from the compromised server.
Likely Case
Information disclosure from internal services, potential data exfiltration, and reconnaissance of internal network.
If Mitigated
Limited impact if network segmentation restricts the vulnerable server's access to sensitive internal resources.
🎯 Exploit Status
Exploitation details are publicly available in GitHub repositories. Requires access to the chat interface, which may need authentication.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Not available
Vendor Advisory: https://github.com/sanluan/PublicCMS/issues/99
Restart Required: No
Instructions:
No official patch available. Monitor the GitHub repository for updates and apply when released.
🔧 Temporary Workarounds
Disable Chat Interface
allRemove or disable the SimpleAiAdminController chat interface to prevent exploitation.
# Remove or comment out chat interface routes in configuration files
# Disable the SimpleAiAdminController component
Network Segmentation
allRestrict outbound network access from the PublicCMS server to only necessary external services.
# Configure firewall rules to block outbound requests to internal IP ranges
# Use network policies to limit server egress
🧯 If You Can't Patch
- Implement strict input validation and URL filtering in the chat interface
- Deploy a web application firewall (WAF) with SSRF protection rules
🔍 How to Verify
Check if Vulnerable:
Check if running PublicCMS version V5.202506.b and if the SimpleAiAdminController chat interface is accessible.Check Version:
# Check PublicCMS version in admin panel or configuration filesVerify Fix Applied:
Verify that the chat interface is disabled or that the vulnerability is patched in a newer version.📡 Detection & Monitoring
Log Indicators:
- Unusual outbound HTTP requests from the PublicCMS server to internal IP addresses
- Chat interface requests with external URLs in parameters
Network Indicators:
- Outbound requests from PublicCMS server to internal services not typically accessed
SIEM Query:
source="publiccms-logs" AND (url_contains="internal" OR dest_ip=private_ip_range)