CVE-2021-46448
📋 TL;DR
This vulnerability allows attackers to execute arbitrary SQL commands via the customers.php admin endpoint in H.H.G Multistore. Attackers can potentially access, modify, or delete database content. All users running H.H.G Multistore v5.1.0 or earlier are affected.
💻 Affected Systems
- H.H.G Multistore
📦 What is this software?
Multistore by Hhg Multistore
Multistore by Hhg Multistore
⚠️ Risk & Real-World Impact
Worst Case
Complete database compromise leading to data theft, data destruction, or full system takeover via SQL injection to RCE chaining.
Likely Case
Unauthorized access to customer data, administrative credentials, or sensitive business information stored in the database.
If Mitigated
Limited impact with proper input validation, parameterized queries, and database permission restrictions in place.
🎯 Exploit Status
Exploit requires admin access or authentication bypass. SQL injection is straightforward once endpoint access is obtained.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: https://www.hhg-multistore.com/
Restart Required: No
Instructions:
1. Check vendor website for security updates. 2. If no patch available, implement workarounds immediately. 3. Consider migrating to supported software if vendor is unresponsive.
🔧 Temporary Workarounds
Input Validation Filter
allAdd server-side validation to sanitize cID parameter in customers.php
Modify /admin/customers.php to validate cID as integer: if(!is_numeric($_GET['cID'])) { die('Invalid input'); }
Web Application Firewall Rule
allBlock SQL injection patterns targeting the vulnerable endpoint
WAF rule to block requests containing SQL keywords in cID parameter to /admin/customers.php
🧯 If You Can't Patch
- Restrict network access to admin interface using IP whitelisting
- Implement database user with minimal permissions (read-only if possible)
🔍 How to Verify
Check if Vulnerable:
Test /admin/customers.php?page=1&cID=1' with SQL injection payloads and observe database errors or unexpected behavior.Check Version:
Check software version in admin panel or configuration filesVerify Fix Applied:
Test with same payloads after fixes - should receive proper error messages or no database errors.📡 Detection & Monitoring
Log Indicators:
- Unusual SQL errors in application logs
- Multiple failed login attempts followed by SQL injection patterns
- Unexpected database queries from admin interface
Network Indicators:
- HTTP requests to /admin/customers.php containing SQL keywords in parameters
- Unusual database traffic from web server
SIEM Query:
source="web_logs" AND uri="/admin/customers.php" AND (param="cID" AND value MATCHES "'.*?(SELECT|UNION|INSERT|UPDATE|DELETE|DROP).*?'")