How the CVE Works:
The vulnerability in Jenkins (CVE-2025-XXXX) arises due to the lack of POST request enforcement for the HTTP endpoint responsible for toggling the collapsed/expanded status of sidepanel widgets, such as the Build Queue and Build Executor Status widgets. In Jenkins versions 2.499 and earlier, as well as LTS 2.492.1 and earlier, this endpoint accepts GET requests, making it susceptible to CSRF attacks. An attacker can craft a malicious link or script that, when accessed by an authenticated user, triggers unauthorized toggling of these widgets. Additionally, the API accepts arbitrary strings as panel IDs, enabling attackers to inject malicious content into the victim’s Jenkins user profile. This vulnerability is mitigated in Jenkins 2.500 and LTS 2.492.2, which enforce POST requests for the affected endpoint.
DailyCVE Form:
Platform: Jenkins
Version: <= 2.499, <= 2.492.1
Vulnerability: CSRF
Severity: Moderate
Date: Mar 6, 2025
(End of form)
What Undercode Say:
Exploitation:
- Crafting Malicious URL: An attacker can create a URL that toggles the sidepanel widget state when accessed by an authenticated user.
Example: `http:///toggleWidget?widgetId=maliciousPayload`
2. Storing Malicious Content: By exploiting the API’s acceptance of arbitrary strings, attackers can inject malicious content into the victim’s Jenkins profile. - CSRF Payload: A simple HTML payload can be used to trigger the vulnerability:
<img src="http://<jenkins-server>/toggleWidget?widgetId=maliciousPayload" style="display:none;">
Protection:
- Upgrade Jenkins: Ensure Jenkins is updated to version 2.500 or LTS 2.492.2.
sudo apt-get update && sudo apt-get install jenkins
- Enforce POST Requests: Modify Jenkins configurations to enforce POST requests for sensitive endpoints.
- CSRF Tokens: Implement CSRF tokens in Jenkins to validate requests.
- Web Application Firewall (WAF): Deploy a WAF to filter out malicious requests.
- Security Headers: Add security headers like `Content-Security-Policy` to mitigate XSS and CSRF risks.
References:
Commands:
- Check Jenkins version:
java -jar jenkins.war --version
- Upgrade Jenkins:
wget http://updates.jenkins-ci.org/download/war/2.500/jenkins.war
Analytics:
- Affected Users: Jenkins users running versions <= 2.499 or <= 2.492.1.
- Risk Level: Moderate, due to the potential for unauthorized actions and data injection.
- Patch Availability: Immediate, via Jenkins 2.500 and LTS 2.492.2.
By following these steps, users can mitigate the risks associated with this CSRF vulnerability and secure their Jenkins instances.
References:
Reported By: https://github.com/advisories/GHSA-7g95-jmg9-h524
Extra Source Hub:
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