CVE-2020-20726
📋 TL;DR
This CVE describes a Cross-Site Request Forgery (CSRF) vulnerability in GilaCMS v1.11.4 that allows remote attackers to execute arbitrary code via the cm/update_rows/user parameter. Attackers can trick authenticated users into performing unintended actions, potentially leading to complete system compromise. All users running GilaCMS v1.11.4 are affected.
💻 Affected Systems
- GilaCMS
📦 What is this software?
Gila Cms by Gilacms
⚠️ Risk & Real-World Impact
Worst Case
Remote code execution leading to complete system takeover, data theft, and lateral movement within the network.
Likely Case
Unauthorized user account creation/modification, privilege escalation, or configuration changes.
If Mitigated
Attack fails due to proper CSRF protections, resulting in no impact.
🎯 Exploit Status
CSRF exploitation is well-understood and requires minimal technical skill. The GitHub issue shows proof of concept.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: v1.11.5 or later
Vendor Advisory: https://github.com/GilaCMS/gila/issues/51
Restart Required: No
Instructions:
1. Backup your GilaCMS installation and database. 2. Download the latest version from the official repository. 3. Replace the affected files with patched versions. 4. Verify CSRF tokens are properly implemented in all forms.
🔧 Temporary Workarounds
Implement CSRF Protection
allAdd CSRF tokens to all forms and validate them server-side.
Modify form templates to include CSRF tokens and update server-side validation logic
Restrict User Management Access
allLimit access to user management functions to specific IP addresses or admin roles only.
Configure web server or application firewall rules to restrict /cm/update_rows/user endpoint
🧯 If You Can't Patch
- Implement strict SameSite cookie policies and CORS restrictions
- Deploy a WAF with CSRF protection rules and monitor for suspicious user management activities
🔍 How to Verify
Check if Vulnerable:
Check if running GilaCMS v1.11.4 and examine if forms lack proper CSRF token validation.Check Version:
Check GilaCMS version in admin panel or examine version files in installation directoryVerify Fix Applied:
Verify installation is updated to v1.11.5+ and test that all forms include and validate CSRF tokens.📡 Detection & Monitoring
Log Indicators:
- Multiple failed user modification attempts
- User account changes from unexpected IP addresses
- Requests to /cm/update_rows/user without referrer headers
Network Indicators:
- HTTP POST requests to user management endpoints without CSRF tokens
- Requests originating from known malicious domains
SIEM Query:
source="web_logs" AND (uri_path="/cm/update_rows/user" AND NOT csrf_token=*)