CVE-2020-24130
📋 TL;DR
This CSRF vulnerability in Ponzu CMS 0.11.0 allows attackers to trick authenticated users into performing unauthorized actions through malicious requests. Attackers can change user/admin credentials and add/delete administrator accounts without the victim's knowledge. All Ponzu 0.11.0 installations with the configure.html component accessible are affected.
💻 Affected Systems
- Ponzu CMS
📦 What is this software?
Ponzu by Ponzu Cms
⚠️ Risk & Real-World Impact
Worst Case
Complete compromise of the CMS instance with attacker gaining administrative control, data manipulation, and potential lateral movement to connected systems.
Likely Case
Unauthorized account creation or credential changes leading to privilege escalation and data breaches.
If Mitigated
Limited impact if proper CSRF protections are implemented or if the vulnerable component is not internet-facing.
🎯 Exploit Status
Exploitation requires the victim to be authenticated and visit a malicious page while logged into Ponzu. No authentication bypass needed.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 0.11.1 or later
Vendor Advisory: https://github.com/ponzu-cms/ponzu/issues/352
Restart Required: Yes
Instructions:
1. Backup current installation. 2. Update Ponzu to version 0.11.1 or later. 3. Restart the Ponzu service. 4. Verify the fix by checking version and testing CSRF protections.
🔧 Temporary Workarounds
CSRF Token Implementation
allManually add CSRF tokens to configure.html forms
Modify configure.html to include CSRF tokens in all forms and validate them server-side
Access Restriction
allRestrict access to configure.html component
Configure web server (nginx/apache) to restrict access to /admin/configure.html to trusted IPs only
🧯 If You Can't Patch
- Implement strict SameSite cookie policies and CORS restrictions
- Use web application firewall (WAF) rules to detect and block CSRF attempts
🔍 How to Verify
Check if Vulnerable:
Check if running Ponzu version 0.11.0 and if configure.html endpoint is accessible without CSRF tokensCheck Version:
ponzu versionVerify Fix Applied:
Verify Ponzu version is 0.11.1+ and test that configure.html forms now require valid CSRF tokens📡 Detection & Monitoring
Log Indicators:
- Multiple failed authentication attempts followed by successful configure.html access
- Unusual account creation or credential change events
Network Indicators:
- Requests to configure.html without proper referrer headers or CSRF tokens
- Cross-origin requests to administrative endpoints
SIEM Query:
source="ponzu" AND (uri="/admin/configure.html" OR event="account_creation" OR event="password_change")