CVE-2021-47909
📋 TL;DR
Mult-E-Cart Ultimate 2.4 contains SQL injection vulnerabilities in multiple modules (inventory, customer, vendor, order) where attackers with vendor or admin privileges can manipulate 'id' parameters to execute arbitrary SQL commands. This allows database compromise including data theft, modification, or deletion. Only authenticated privileged users can exploit this vulnerability.
💻 Affected Systems
- Mult-E-Cart Ultimate
⚠️ Risk & Real-World Impact
Worst Case
Complete database compromise leading to data theft, destruction, or full system takeover via SQL command execution with database administrator privileges.
Likely Case
Unauthorized data access, modification, or deletion of sensitive information including customer data, orders, and inventory records.
If Mitigated
Limited impact with proper input validation and parameterized queries preventing SQL injection.
🎯 Exploit Status
SQL injection via 'id' parameter is well-documented and requires only basic SQL knowledge. Public proof-of-concept exists in vulnerability databases.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: https://ultimate.multecart.com/
Restart Required: No
Instructions:
1. Check vendor website for security updates. 2. Upgrade to patched version if available. 3. Apply input validation and parameterized queries to all 'id' parameters.
🔧 Temporary Workarounds
Input Validation Filter
allImplement strict input validation to only accept numeric values for 'id' parameters
Implement server-side validation: if (!is_numeric($_GET['id'])) { die('Invalid input'); }
Web Application Firewall Rules
allDeploy WAF rules to block SQL injection patterns in 'id' parameters
Configure WAF to block patterns like: UNION, SELECT, INSERT, DELETE, DROP, --, /*, ;, '
🧯 If You Can't Patch
- Implement strict input validation and parameterized queries for all database interactions
- Restrict vendor and admin account access to minimum necessary users and implement strong authentication
🔍 How to Verify
Check if Vulnerable:
Test 'id' parameters in inventory, customer, vendor, and order modules with SQL injection payloads like: id=1' OR '1'='1Check Version:
Check Mult-E-Cart admin panel or configuration files for version informationVerify Fix Applied:
Verify that SQL injection payloads no longer work and return error messages or are properly sanitized📡 Detection & Monitoring
Log Indicators:
- Unusual SQL error messages in application logs
- Multiple failed login attempts followed by SQL injection attempts
- Unexpected database queries from vendor/admin accounts
Network Indicators:
- HTTP requests with SQL keywords in 'id' parameters
- Unusual database connection patterns from application server
SIEM Query:
source="web_logs" AND ("UNION" OR "SELECT" OR "INSERT" OR "DELETE") AND "id="