CVE-2020-19886
📋 TL;DR
DBHcms v1.2.0 lacks CSRF protection, allowing attackers to trick authenticated administrators into performing unauthorized actions. This vulnerability enables deletion of any menu via a crafted request. Any DBHcms v1.2.0 installation with administrative access is affected.
💻 Affected Systems
- DBHcms
📦 What is this software?
Dbhcms by Dbhcms Project
⚠️ Risk & Real-World Impact
Worst Case
Complete website defacement or disruption through deletion of critical navigation menus, potentially requiring full restoration from backups.
Likely Case
Unauthorized deletion of website menus causing navigation issues and requiring manual restoration.
If Mitigated
No impact if proper CSRF tokens are implemented and validated.
🎯 Exploit Status
Exploitation requires tricking an authenticated admin into visiting a malicious page. Proof-of-concept is publicly available.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: None known
Restart Required: No
Instructions:
No official patch available. Consider upgrading to a newer version if available, or implement CSRF protection manually.
🔧 Temporary Workarounds
Implement CSRF Token Protection
allAdd CSRF tokens to all forms and validate them on the server side.
Manual code modification required - add unique tokens to forms and validate in PHP
Use SameSite Cookies
allSet SameSite=Strict or Lax on session cookies to prevent CSRF via cross-site requests.
session_set_cookie_params(['samesite' => 'Strict']); in PHP configuration
🧯 If You Can't Patch
- Implement web application firewall (WAF) rules to detect and block CSRF attempts
- Restrict administrative access to specific IP addresses or VPN-only connections
🔍 How to Verify
Check if Vulnerable:
Check if /index.php?dbhcms_pid=-80&deletemenu=9 endpoint lacks CSRF token validation when accessed via POST.Check Version:
Check DBHcms version in admin panel or configuration files.Verify Fix Applied:
Verify that all forms include and validate CSRF tokens, and test that unauthorized requests are rejected.📡 Detection & Monitoring
Log Indicators:
- Multiple DELETE requests to menu endpoints from unusual referrers
- Admin session activity followed by menu deletion without corresponding form submissions
Network Indicators:
- HTTP requests to deletemenu endpoints with suspicious referrer headers
- Cross-origin requests to administrative endpoints
SIEM Query:
web.url:*deletemenu* AND NOT web.referrer:*yourdomain.com*