CVE-2025-64773
📋 TL;DR
A race condition vulnerability in JetBrains YouTrack allows bypassing helpdesk Agent license limits. This affects organizations using YouTrack's helpdesk functionality with concurrent user access. Attackers could potentially create more Agent accounts than licensed, violating licensing terms.
💻 Affected Systems
- JetBrains YouTrack
📦 What is this software?
Youtrack by Jetbrains
⚠️ Risk & Real-World Impact
Worst Case
Unauthorized users gain Agent privileges beyond licensed limits, potentially accessing sensitive helpdesk data and performing administrative actions without proper authorization.
Likely Case
License compliance violation where organizations unintentionally exceed Agent limits, potentially leading to licensing audit issues or unexpected costs.
If Mitigated
Minimal impact with proper access controls and monitoring; primarily a licensing compliance issue rather than security breach.
🎯 Exploit Status
Requires authenticated access and precise timing to trigger race condition; not trivial to exploit reliably.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 2025.3.104432
Vendor Advisory: https://www.jetbrains.com/privacy-security/issues-fixed/
Restart Required: Yes
Instructions:
1. Backup YouTrack data and configuration. 2. Download YouTrack 2025.3.104432 or later from JetBrains website. 3. Stop YouTrack service. 4. Install/upgrade to patched version. 5. Restart YouTrack service. 6. Verify version and functionality.
🔧 Temporary Workarounds
Limit Concurrent Sessions
allReduce simultaneous user access to minimize race condition opportunities
Monitor Agent Count
allImplement regular checks of active Agent accounts against license limits
🧯 If You Can't Patch
- Implement strict access controls and monitor Agent account creation
- Regularly audit Agent counts and enforce license compliance manually
🔍 How to Verify
Check if Vulnerable:
Check YouTrack version in Administration → System → About. If version is earlier than 2025.3.104432, system is vulnerable.Check Version:
Check web interface at Administration → System → About or review server logs for version information.Verify Fix Applied:
Confirm version is 2025.3.104432 or later in Administration → System → About, then test Agent creation under concurrent load.📡 Detection & Monitoring
Log Indicators:
- Multiple Agent creation attempts within short timeframes
- License limit warnings or errors in logs
Network Indicators:
- Unusual patterns of concurrent authentication requests
- Multiple Agent creation API calls in rapid succession
SIEM Query:
source="youtrack" AND (event="agent_created" OR event="license_limit") | stats count by user, time span=1m