CVE-2025-15116
📋 TL;DR
A race condition vulnerability exists in OpenCart's Single-Use Coupon Handler component, allowing attackers to potentially bypass coupon usage restrictions. This affects OpenCart installations up to version 4.1.0.3. Attackers could exploit this remotely to misuse promotional coupons.
💻 Affected Systems
- OpenCart
📦 What is this software?
Opencart by Opencart
⚠️ Risk & Real-World Impact
Worst Case
Attackers could repeatedly use single-use coupons, causing financial loss through coupon abuse or inventory manipulation.
Likely Case
Limited coupon abuse resulting in minor financial impact or promotional campaign disruption.
If Mitigated
Minimal impact with proper coupon usage monitoring and rate limiting in place.
🎯 Exploit Status
Exploit requires precise timing and understanding of coupon handling logic.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: None available
Restart Required: No
Instructions:
No official patch available. Monitor OpenCart releases for updates.
🔧 Temporary Workarounds
Disable Single-Use Coupons
allTemporarily disable single-use coupon functionality until patch is available
Implement Rate Limiting
allAdd rate limiting to coupon redemption endpoints
🧯 If You Can't Patch
- Implement web application firewall rules to detect rapid coupon redemption attempts
- Monitor coupon usage logs for abnormal patterns and implement manual review
🔍 How to Verify
Check if Vulnerable:
Check OpenCart version in admin panel or via /admin/index.php?route=common/dashboardCheck Version:
Check OpenCart admin panel or examine system/config/admin.phpVerify Fix Applied:
Verify version is above 4.1.0.3 when patch becomes available📡 Detection & Monitoring
Log Indicators:
- Multiple coupon redemption attempts from same IP/session in short timeframe
- Unusual coupon usage patterns
Network Indicators:
- Rapid POST requests to coupon redemption endpoints
SIEM Query:
source="opencart-logs" AND (message="coupon" OR message="voucher") | stats count by src_ip, coupon_code | where count > threshold