CVE-2025-64149
📋 TL;DR
A CSRF vulnerability in Jenkins Publish to Bitbucket Plugin allows attackers to trick authenticated users into connecting Jenkins to attacker-controlled Bitbucket servers using stolen credentials. This could expose sensitive credentials stored in Jenkins. Only Jenkins instances with this specific plugin installed are affected.
💻 Affected Systems
- Jenkins Publish to Bitbucket Plugin
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Attackers capture all credentials stored in Jenkins, potentially gaining access to source code repositories, deployment systems, and other connected services.
Likely Case
Attackers capture specific credentials used for Bitbucket access, potentially compromising source code or deployment pipelines.
If Mitigated
With proper CSRF protections and credential access controls, impact is limited to potential unauthorized Bitbucket connections.
🎯 Exploit Status
Requires attacker to obtain valid credentials IDs through other means and trick authenticated users into visiting malicious pages.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 0.5 or later
Vendor Advisory: https://www.jenkins.io/security/advisory/2025-10-29/#SECURITY-3576
Restart Required: No
Instructions:
1. Open Jenkins web interface. 2. Navigate to Manage Jenkins > Manage Plugins. 3. Go to Available tab. 4. Search for 'Publish to Bitbucket Plugin'. 5. Check for update to version 0.5 or later. 6. Install update.
🔧 Temporary Workarounds
Disable plugin
allTemporarily disable the vulnerable plugin until patching is possible
Navigate to Manage Jenkins > Manage Plugins > Installed tab, find 'Publish to Bitbucket Plugin', click 'Disable'
🧯 If You Can't Patch
- Implement strict CSRF protection headers and SameSite cookie attributes
- Restrict user permissions to only necessary plugin functions and credential access
🔍 How to Verify
Check if Vulnerable:
Check plugin version in Jenkins: Manage Jenkins > Manage Plugins > Installed tab, look for 'Publish to Bitbucket Plugin' versionCheck Version:
No CLI command; check via Jenkins web interface as describedVerify Fix Applied:
Verify plugin version is 0.5 or higher in Manage Jenkins > Manage Plugins > Installed tab📡 Detection & Monitoring
Log Indicators:
- Unexpected Bitbucket server connection attempts
- Failed authentication attempts to new Bitbucket URLs
Network Indicators:
- Outbound connections to unfamiliar Bitbucket server addresses
SIEM Query:
source="jenkins.log" AND ("Bitbucket" AND "connection" AND "failed" OR "unauthorized")