CVE-2025-45608
📋 TL;DR
This vulnerability allows attackers to bypass access controls in Xinguan v0.0.1-SNAPSHOT's /system/user/findUserList API, enabling unauthorized access to sensitive user information. Attackers can exploit this by sending specially crafted payloads to the vulnerable endpoint. Organizations using this specific version of Xinguan are affected.
💻 Affected Systems
- Xinguan
📦 What is this software?
Xinguan by Zykzhangyukang
⚠️ Risk & Real-World Impact
Worst Case
Complete compromise of all user data including credentials, personal information, and system access details, potentially leading to identity theft, account takeover, and lateral movement within the system.
Likely Case
Unauthorized access to user lists containing sensitive information such as usernames, email addresses, roles, and potentially other user metadata.
If Mitigated
Limited or no data exposure due to proper authentication and authorization controls preventing access to the vulnerable endpoint.
🎯 Exploit Status
The vulnerability appears to be an API endpoint with insufficient access controls, making exploitation relatively straightforward once the endpoint is discovered.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: https://github.com/zykzhangyukang/Xinguan/issues/26
Restart Required: No
Instructions:
1. Monitor the GitHub issue for official patches or updates. 2. Consider upgrading to a newer, non-vulnerable version if available. 3. Implement proper access controls on the /system/user/findUserList API endpoint.
🔧 Temporary Workarounds
API Endpoint Restriction
linuxRestrict access to the vulnerable /system/user/findUserList endpoint using network controls or web application firewalls.
iptables -A INPUT -p tcp --dport [PORT] -m string --string "/system/user/findUserList" --algo bm -j DROP
Authentication Enforcement
allImplement mandatory authentication for all API endpoints, including /system/user/findUserList.
🧯 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 block unauthorized access to the /system/user/findUserList endpoint.
🔍 How to Verify
Check if Vulnerable:
Send a crafted request to /system/user/findUserList endpoint without authentication and check if user data is returned.Check Version:
Check application configuration files or documentation for version information; typically found in pom.xml for Java applications.Verify Fix Applied:
Attempt the same unauthorized request after implementing fixes; it should return an authentication error or no data.📡 Detection & Monitoring
Log Indicators:
- Unauthorized access attempts to /system/user/findUserList
- Unusual volume of requests to user API endpoints
- Requests from unexpected IP addresses to sensitive endpoints
Network Indicators:
- HTTP requests to /system/user/findUserList without authentication headers
- Unusual patterns of API calls to user management endpoints
SIEM Query:
source="web_server" AND (uri="/system/user/findUserList" AND NOT (user_agent="legitimate_client" OR auth_token="*"))