CVE-2025-53652
📋 TL;DR
The Jenkins Git Parameter Plugin vulnerability allows attackers with Item/Build permission to inject arbitrary values into Git parameters by bypassing validation. This affects Jenkins instances using the Git Parameter Plugin version 439.vb_0e46ca_14534 and earlier. Attackers could manipulate Git operations to execute unauthorized code or access restricted repositories.
💻 Affected Systems
- Jenkins Git Parameter Plugin
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Attackers could execute arbitrary code on Jenkins controllers, compromise build pipelines, steal credentials, or exfiltrate source code from private repositories.
Likely Case
Attackers manipulate Git parameters to access unauthorized repositories, modify build configurations, or inject malicious code into build processes.
If Mitigated
With proper access controls and network segmentation, impact is limited to unauthorized Git operations within the Jenkins environment.
🎯 Exploit Status
Exploitation requires authenticated access with Item/Build permission. Attack involves submitting modified parameter values to bypass validation.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 440.vb_0e46ca_14535 or later
Vendor Advisory: https://www.jenkins.io/security/advisory/2025-07-09/#SECURITY-3419
Restart Required: Yes
Instructions:
1. Update Jenkins Git Parameter Plugin to version 440.vb_0e46ca_14535 or later via Jenkins Plugin Manager. 2. Restart Jenkins instance. 3. Verify plugin version in Manage Jenkins > Plugin Manager.
🔧 Temporary Workarounds
Restrict Item/Build Permissions
allTighten access controls to limit who has Item/Build permission on Jenkins instances.
Configure Jenkins Role-Based Strategy to restrict permissions
Disable Git Parameter Plugin
allTemporarily disable the vulnerable plugin if immediate update is not possible.
Manage Jenkins > Plugin Manager > Installed > Git Parameter Plugin > Disable
🧯 If You Can't Patch
- Implement strict network segmentation to isolate Jenkins from sensitive repositories
- Enable detailed audit logging for all Git parameter operations and monitor for anomalies
🔍 How to Verify
Check if Vulnerable:
Check Jenkins Plugin Manager for Git Parameter Plugin version. If version is 439.vb_0e46ca_14534 or earlier, system is vulnerable.Check Version:
Check via Jenkins web UI: Manage Jenkins > Plugin Manager > Installed > Git Parameter PluginVerify Fix Applied:
Verify Git Parameter Plugin version is 440.vb_0e46ca_14535 or later in Plugin Manager. Test that Git parameters now properly validate submitted values.📡 Detection & Monitoring
Log Indicators:
- Unusual Git parameter values in build logs
- Git operations to unexpected repositories
- Failed parameter validation attempts
Network Indicators:
- Unexpected Git clone/fetch operations from Jenkins to new repositories
- Increased Git traffic to unauthorized endpoints
SIEM Query:
source="jenkins" AND ("Git Parameter" OR "git.parameter") AND ("validation failed" OR "unexpected value")