CVE-2025-66744
📋 TL;DR
This vulnerability in Yonyou YonBIP allows attackers to bypass normal directory restrictions via path traversal in the LoginWithV8 interface, potentially accessing sensitive system files and data. It affects all YonBIP v3 and earlier installations. Organizations using these versions are at risk of data exposure.
💻 Affected Systems
- Yonyou YonBIP
⚠️ 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 through access to configuration files, credentials, and sensitive business data, potentially leading to data theft, system manipulation, or further attacks.
Likely Case
Unauthorized access to sensitive files containing configuration data, user information, or business records, resulting in data exposure and potential compliance violations.
If Mitigated
Limited impact with proper network segmentation and access controls, though the vulnerability still exists and could be exploited by authenticated users.
🎯 Exploit Status
Proof-of-concept code is publicly available on GitHub, making exploitation straightforward for attackers with basic knowledge.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: Unknown
Restart Required: No
Instructions:
No official patch available. Monitor Yonyou security advisories for updates and apply immediately when released.
🔧 Temporary Workarounds
Input Validation and Sanitization
allImplement strict input validation on the LoginWithV8 interface to reject path traversal sequences
Web Application Firewall Rules
allDeploy WAF rules to block path traversal patterns in requests to the vulnerable interface
🧯 If You Can't Patch
- Implement strict network segmentation to isolate YonBIP systems from sensitive data stores
- Enable detailed logging and monitoring of all access to the LoginWithV8 interface for suspicious patterns
🔍 How to Verify
Check if Vulnerable:
Test the LoginWithV8 interface with path traversal payloads (e.g., ../../etc/passwd) and observe if restricted files are accessibleCheck Version:
Check YonBIP version through administrative interface or configuration filesVerify Fix Applied:
Retest with the same payloads after implementing workarounds to confirm they are blocked📡 Detection & Monitoring
Log Indicators:
- Unusual file access patterns through LoginWithV8
- Requests containing ../ sequences
- Access to sensitive system files from web interface
Network Indicators:
- HTTP requests to LoginWithV8 with path traversal patterns
- Unusual data exfiltration from the application server
SIEM Query:
source="web_logs" AND uri="*LoginWithV8*" AND (uri="*../*" OR uri="*..\\*" OR uri="*%2e%2e%2f*")