CVE-2025-67739
📋 TL;DR
This vulnerability in JetBrains TeamCity allows attackers to disclose local file paths through improper repository URL validation. It affects TeamCity servers with repository integrations configured. The impact is limited to information disclosure rather than code execution.
💻 Affected Systems
- JetBrains TeamCity
📦 What is this software?
Teamcity by Jetbrains
⚠️ Risk & Real-World Impact
Worst Case
Attackers could map internal server directory structures, potentially revealing sensitive configuration files or credentials stored in predictable locations.
Likely Case
Limited path disclosure revealing TeamCity installation directories and repository paths, which could aid in further reconnaissance attacks.
If Mitigated
With proper network segmentation and access controls, impact is minimal as only path information is disclosed without file content.
🎯 Exploit Status
Exploitation requires access to repository configuration functionality.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 2025.11.2 or later
Vendor Advisory: https://www.jetbrains.com/privacy-security/issues-fixed/
Restart Required: Yes
Instructions:
1. Backup TeamCity configuration and data. 2. Download TeamCity 2025.11.2 or later from JetBrains website. 3. Stop TeamCity service. 4. Install the updated version. 5. Restart TeamCity service. 6. Verify functionality.
🔧 Temporary Workarounds
Restrict Repository Configuration Access
allLimit access to repository configuration features to authorized administrators only
Network Segmentation
allPlace TeamCity server behind firewall with restricted access to repository configuration endpoints
🧯 If You Can't Patch
- Implement strict access controls to repository configuration interfaces
- Monitor logs for unusual repository URL validation attempts
🔍 How to Verify
Check if Vulnerable:
Check TeamCity version via Administration → Server Administration → Server Health → VersionCheck Version:
Check TeamCity web interface or server logs for version informationVerify Fix Applied:
Verify version is 2025.11.2 or later and test repository URL validation functionality📡 Detection & Monitoring
Log Indicators:
- Unusual repository URL validation requests
- Path disclosure patterns in error logs
Network Indicators:
- Multiple requests to repository configuration endpoints from unauthorized sources
SIEM Query:
source="teamcity" AND ("repository" OR "url validation") AND error