CVE-2025-12623
📋 TL;DR
This CVE describes an authorization bypass vulnerability in the fushengqian fuint software's authentication token handler. Attackers can potentially bypass authorization controls to access restricted functionality. Organizations using fuint with the vulnerable ClientSignController component are affected.
💻 Affected Systems
- fushengqian fuint
⚠️ Manual Verification Required
This CVE does not have specific version information in our database, so automatic vulnerability detection cannot determine if your system is affected.
Why? The CVE database entry doesn't specify which versions are vulnerable (no version ranges provided by the vendor/NVD).
🔒 Custom verification scripts are available for registered users. Sign up free to download automated test scripts.
- Review the CVE details at NVD
- Check vendor security advisories for your specific version
- Test if the vulnerability is exploitable in your environment
- Consider updating to the latest version as a precaution
⚠️ Risk & Real-World Impact
Worst Case
Complete system compromise allowing unauthorized access to all protected resources and administrative functions
Likely Case
Unauthorized access to specific protected endpoints or user data
If Mitigated
Limited impact with proper authentication and authorization controls in place
🎯 Exploit Status
Exploit is publicly available but exploitation is described as difficult and highly complex
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown (rolling release model)
Vendor Advisory: https://github.com/fushengqian/fuint/issues/67
Restart Required: Yes
Instructions:
1. Monitor GitHub repository for updates 2. Apply latest commits after fix is released 3. Restart application
🔧 Temporary Workarounds
Authentication Validation Enhancement
allImplement additional authentication validation checks before authorization
Network Segmentation
allRestrict access to fuint application to trusted networks only
🧯 If You Can't Patch
- Implement Web Application Firewall (WAF) with authorization bypass detection rules
- Enable detailed authentication and authorization logging for anomaly detection
🔍 How to Verify
Check if Vulnerable:
Check if your fuint installation includes commit 41e26be8a2c609413a0feaa69bdad33a71ae8032 or earlier in the ClientSignController componentCheck Version:
git log --oneline | grep -i '41e26be8a2c609413a0feaa69bdad33a71ae8032'Verify Fix Applied:
Verify that the ClientSignController.java file has been updated with proper authorization checks📡 Detection & Monitoring
Log Indicators:
- Unusual authentication patterns
- Authorization failures followed by successful access
- Access to protected endpoints without proper authentication
Network Indicators:
- Unusual API calls to authentication endpoints
- Requests bypassing expected authentication flow
SIEM Query:
source="fuint" AND (event_type="auth_bypass" OR (auth_result="failure" AND subsequent_request="success"))