CVE-2025-65840
📋 TL;DR
PublicCMS V5.202506.b contains a CSRF vulnerability in the CkEditorAdminController that allows attackers to trick authenticated administrators into performing unauthorized actions. This affects all users running the vulnerable version who have administrative access to the CMS. Attackers can exploit this by luring administrators to malicious web pages.
💻 Affected Systems
- PublicCMS
📦 What is this software?
Publiccms by Publiccms
⚠️ Risk & Real-World Impact
Worst Case
Complete compromise of CMS administration allowing content manipulation, user account takeover, or injection of malicious code into the site.
Likely Case
Unauthorized content modifications, user privilege escalation, or configuration changes by tricking administrators.
If Mitigated
Limited impact with proper CSRF protections, but still potential for minor unauthorized actions if other vulnerabilities exist.
🎯 Exploit Status
CSRF attacks are well-understood and easy to implement; proof-of-concept is available in GitHub references.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Check GitHub issues for latest patched version
Vendor Advisory: https://github.com/sanluan/PublicCMS/issues/102
Restart Required: No
Instructions:
1. Check the GitHub issue for patch details. 2. Update to the latest version of PublicCMS. 3. Verify CSRF tokens are implemented in CkEditorAdminController.
🔧 Temporary Workarounds
Implement CSRF Protection
allAdd CSRF tokens to all forms and validate them server-side in CkEditorAdminController.
Modify controller to include and validate CSRF tokens
Restrict Admin Access
allLimit administrative access to trusted networks and implement additional authentication factors.
Configure firewall rules to restrict admin panel access
🧯 If You Can't Patch
- Implement web application firewall (WAF) rules to detect and block CSRF attempts
- Monitor administrator sessions for unusual activity and implement session timeouts
🔍 How to Verify
Check if Vulnerable:
Check if CkEditorAdminController endpoints lack CSRF token validation by reviewing source code or testing with CSRF PoC tools.Check Version:
Check PublicCMS version in admin panel or configuration filesVerify Fix Applied:
Test that all CkEditorAdminController endpoints now require and validate CSRF tokens.📡 Detection & Monitoring
Log Indicators:
- Multiple unauthorized requests from same session to CkEditorAdminController endpoints
- Admin actions without corresponding CSRF token validation logs
Network Indicators:
- HTTP requests to admin endpoints without Referer headers or with suspicious origins
SIEM Query:
source="web_logs" AND uri="*CkEditorAdminController*" AND csrf_token="null"