CVE-2025-15085
📋 TL;DR
This vulnerability allows unauthorized users to manipulate the balance deduction function in youlai-mall e-commerce platform, potentially enabling unauthorized balance modifications or financial fraud. It affects all users running youlaitech youlai-mall versions 1.0.0 and 2.0.0 with the vulnerable component enabled.
💻 Affected Systems
- youlaitech youlai-mall
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Attackers could manipulate user account balances, leading to financial loss, unauthorized purchases, or account takeover through balance manipulation.
Likely Case
Unauthorized users could modify their own or other users' account balances, enabling fraudulent transactions or service abuse.
If Mitigated
With proper authorization controls, impact would be limited to attempted unauthorized access that gets blocked.
🎯 Exploit Status
Exploit details are publicly available on GitHub. Attack requires some authentication but bypasses authorization checks.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: None available
Restart Required: Yes
Instructions:
No official patch available. Vendor was contacted but did not respond. Consider upgrading to a newer version if available or implementing custom authorization fixes.
🔧 Temporary Workarounds
Implement Custom Authorization Check
allAdd proper authorization checks in the deductBalance function to verify user permissions before allowing balance modifications.
Modify mall-ums/ums-boot/src/main/java/com/youlai/mall/ums/controller/app/MemberController.java to add authorization validation
Disable Balance Handler Component
allTemporarily disable the vulnerable Balance Handler component if not essential for operations.
Comment out or remove the deductBalance endpoint in MemberController
🧯 If You Can't Patch
- Implement network segmentation to isolate the vulnerable system from untrusted networks
- Deploy a web application firewall (WAF) with rules to detect and block unauthorized balance modification attempts
🔍 How to Verify
Check if Vulnerable:
Check if running youlai-mall version 1.0.0 or 2.0.0 and examine the MemberController.java file for missing authorization checks in deductBalance function.Check Version:
Check application configuration files or build properties for version informationVerify Fix Applied:
Test that unauthorized users cannot successfully call the deductBalance endpoint or modify account balances.📡 Detection & Monitoring
Log Indicators:
- Multiple failed authorization attempts on /api/member/balance/deduct endpoint
- Unusual balance modification patterns
- Access to deductBalance from unauthorized user accounts
Network Indicators:
- HTTP POST requests to balance deduction endpoints from unexpected sources
- Unusual API call patterns to member balance functions
SIEM Query:
source="application.log" AND ("deductBalance" OR "MemberController") AND (status="401" OR status="403")