CVE-2023-26689
📋 TL;DR
This vulnerability allows attackers to modify any user's profile in CS-Cart MultiVendor 4.16.1 through crafted POST requests due to insufficient authorization checks. Attackers can potentially take over accounts, escalate privileges, or modify sensitive user data. All installations running the vulnerable version are affected.
💻 Affected Systems
- CS-Cart MultiVendor
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete compromise of all user accounts, including administrative accounts, leading to full system takeover, data theft, and unauthorized administrative actions.
Likely Case
Attackers modify user profiles to change email addresses, passwords, or permissions, enabling account takeover and privilege escalation.
If Mitigated
With proper authorization controls, only authenticated users with appropriate permissions can modify profiles, limiting impact to authorized changes.
🎯 Exploit Status
Exploitation requires sending crafted POST requests to vulnerable endpoints. The GitHub reference contains technical details.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 4.16.2 or later
Vendor Advisory: https://docs.cs-cart.com/latest/security/
Restart Required: No
Instructions:
1. Backup your installation and database. 2. Update to CS-Cart MultiVendor 4.16.2 or later through the admin panel or manual update. 3. Verify the update completed successfully.
🔧 Temporary Workarounds
Temporary API endpoint restriction
allRestrict access to vulnerable API endpoints using web server configuration or WAF rules.
# Example Apache .htaccess rule
RewriteRule ^api/v1/users/.*$ - [F,L]
🧯 If You Can't Patch
- Implement strict input validation and authorization checks for all user profile modification requests.
- Deploy a web application firewall (WAF) with rules to block suspicious POST requests to user profile endpoints.
🔍 How to Verify
Check if Vulnerable:
Check if your CS-Cart MultiVendor version is 4.16.1. Attempt to modify another user's profile via API without proper authorization.Check Version:
Check admin panel dashboard or view /config.php for version information.Verify Fix Applied:
After updating, verify the version is 4.16.2 or later and test that unauthorized profile modifications are blocked.📡 Detection & Monitoring
Log Indicators:
- Unusual POST requests to user profile API endpoints
- Multiple failed authorization attempts followed by successful profile modifications
- User profile changes from unexpected IP addresses
Network Indicators:
- POST requests to /api/v1/users/ endpoints with unusual parameters
- Traffic patterns showing profile modifications from unauthenticated or low-privilege users
SIEM Query:
source="web_server_logs" AND (uri_path="/api/v1/users/" AND http_method="POST") AND NOT user_role="admin"