CVE-2023-49446
📋 TL;DR
JFinalCMS v5.0.0 contains a CSRF vulnerability in the navigation management area that allows attackers to trick authenticated administrators into performing unauthorized actions. This affects all JFinalCMS v5.0.0 installations with admin panel access. Attackers can modify navigation settings without the admin's knowledge.
💻 Affected Systems
- JFinalCMS
📦 What is this software?
Jfinalcms by Jfinalcms Project
⚠️ Risk & Real-World Impact
Worst Case
Attackers could completely compromise the CMS by modifying navigation to redirect users to malicious sites, inject malicious content, or alter site structure to facilitate further attacks.
Likely Case
Attackers modify navigation links to redirect users to phishing sites or inject malicious scripts, potentially compromising user data and site integrity.
If Mitigated
With proper CSRF protections, no unauthorized navigation modifications can occur through this endpoint.
🎯 Exploit Status
CSRF attacks require the victim to be authenticated as an administrator and visit a malicious page. The exploit is straightforward once the malicious page is crafted.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Not specified
Vendor Advisory: Not available
Restart Required: No
Instructions:
No official patch available. Implement CSRF tokens in the /admin/nav/save endpoint following secure coding practices.
🔧 Temporary Workarounds
Implement CSRF Protection
allAdd CSRF token validation to the /admin/nav/save endpoint
Modify JFinalCMS source code to include CSRF token generation and validation for navigation management forms
Restrict Admin Access
allLimit admin panel access to trusted networks only
Configure firewall rules to restrict access to /admin paths from internal IPs only
🧯 If You Can't Patch
- Implement web application firewall (WAF) rules to detect and block CSRF attempts
- Require re-authentication for sensitive administrative actions like navigation modifications
🔍 How to Verify
Check if Vulnerable:
Check if JFinalCMS version is 5.0.0 and if /admin/nav/save endpoint lacks CSRF token validationCheck Version:
Check JFinalCMS configuration files or admin panel for version informationVerify Fix Applied:
Test that navigation modification requests without valid CSRF tokens are rejected📡 Detection & Monitoring
Log Indicators:
- Multiple failed POST requests to /admin/nav/save from different sessions
- Navigation modifications from unexpected IP addresses
Network Indicators:
- POST requests to /admin/nav/save without Referer header or with external Referer
- Requests with suspicious parameters in navigation data
SIEM Query:
source="web_logs" AND uri="/admin/nav/save" AND method="POST" AND (NOT referer CONTAINS "yourdomain.com" OR referer="-")