CVE-2019-10100
📋 TL;DR
This CVE describes a Server-Side Template Injection vulnerability in JetBrains YouTrack Confluence plugin that allows remote code execution. Attackers can inject malicious templates through the Issue macro to execute arbitrary code on the server. Organizations using vulnerable versions of the YouTrack Confluence plugin are affected.
💻 Affected Systems
- JetBrains YouTrack Confluence plugin
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Full server compromise allowing attacker to execute arbitrary commands, access sensitive data, pivot to other systems, and maintain persistent access.
Likely Case
Remote code execution leading to data theft, privilege escalation, and potential lateral movement within the Confluence environment.
If Mitigated
Limited impact with proper network segmentation and access controls, potentially only affecting the Confluence application server.
🎯 Exploit Status
Exploitation requires ability to add Issue macros to Confluence pages, which typically requires some level of access. The template injection technique is well-documented.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 1.8.1.3
Vendor Advisory: https://blog.jetbrains.com/blog/2019/06/19/jetbrains-security-bulletin-q1-2019/
Restart Required: Yes
Instructions:
1. Access Confluence administration console. 2. Navigate to Manage Apps/Add-ons. 3. Find YouTrack plugin. 4. Update to version 1.8.1.3 or later. 5. Restart Confluence service.
🔧 Temporary Workarounds
Disable YouTrack plugin
allTemporarily disable the vulnerable plugin until patching can be completed
Navigate to Confluence admin > Manage apps > YouTrack plugin > Disable
Restrict macro permissions
allLimit who can add Issue macros to Confluence pages
Configure Confluence space permissions to restrict macro usage to trusted users only
🧯 If You Can't Patch
- Implement strict network segmentation to isolate Confluence servers from critical systems
- Enforce principle of least privilege for Confluence user accounts and monitor for suspicious macro usage
🔍 How to Verify
Check if Vulnerable:
Check YouTrack plugin version in Confluence admin console under Manage Apps/Add-onsCheck Version:
Check Confluence admin interface: Manage apps > YouTrack plugin > VersionVerify Fix Applied:
Confirm plugin version is 1.8.1.3 or later in Confluence admin console📡 Detection & Monitoring
Log Indicators:
- Unusual template rendering errors
- Multiple failed macro execution attempts
- Suspicious user activity adding Issue macros
Network Indicators:
- Unusual outbound connections from Confluence server
- Payloads containing template injection patterns
SIEM Query:
source="confluence.log" AND ("template injection" OR "macro execution" OR "YouTrack plugin")