CVE-2025-67636
📋 TL;DR
This vulnerability in Jenkins allows attackers with View/Read permission to view encrypted password values in views. It affects Jenkins 2.540 and earlier, and LTS 2.528.2 and earlier. Users with limited permissions can access sensitive credential information they shouldn't be able to see.
💻 Affected Systems
- Jenkins
📦 What is this software?
Jenkins by Jenkins
Jenkins by Jenkins
⚠️ Risk & Real-World Impact
Worst Case
Attackers with View/Read permission could extract encrypted passwords, potentially leading to credential compromise and lateral movement within the Jenkins environment.
Likely Case
Users with View/Read permission can access encrypted password values in views, exposing sensitive credential information that should be restricted to users with higher privileges.
If Mitigated
With proper access controls and monitoring, the impact is limited to information disclosure of encrypted credentials rather than plaintext passwords.
🎯 Exploit Status
Exploitation requires View/Read permission, making it accessible to many users but not completely unauthenticated.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Jenkins 2.541, LTS 2.528.3
Vendor Advisory: https://www.jenkins.io/security/advisory/2025-12-10/#SECURITY-1809
Restart Required: Yes
Instructions:
1. Backup your Jenkins instance. 2. Upgrade to Jenkins 2.541 or LTS 2.528.3. 3. Restart Jenkins service. 4. Verify the upgrade completed successfully.
🔧 Temporary Workarounds
Restrict View/Read Permissions
allTemporarily restrict View/Read permissions to trusted users only until patching can be completed.
🧯 If You Can't Patch
- Review and audit all users with View/Read permissions, removing unnecessary access
- Implement additional monitoring for credential access attempts and review audit logs regularly
🔍 How to Verify
Check if Vulnerable:
Check Jenkins version via Manage Jenkins > About Jenkins or via CLI with 'java -jar jenkins.war --version'Check Version:
java -jar jenkins.war --versionVerify Fix Applied:
Verify Jenkins version is 2.541 or higher, or LTS 2.528.3 or higher📡 Detection & Monitoring
Log Indicators:
- Unusual access patterns to views containing credentials
- Multiple credential view requests from users with only View/Read permissions
Network Indicators:
- Increased requests to view endpoints from users with limited permissions
SIEM Query:
source="jenkins" AND (event="view_access" OR event="credential_access") AND user_permission="view_read"