CVE-2020-2113 : Security Advisory and Response

Jenkins Git Parameter Plugin 0.9.11 and earlier versions are vulnerable to stored cross-site scripting attacks.

Understanding CVE-2020-2113

This CVE involves a security vulnerability in the Jenkins Git Parameter Plugin that allows stored cross-site scripting attacks.

What is CVE-2020-2113?

Jenkins Git Parameter Plugin versions 0.9.11 and below do not properly escape the default value displayed on the user interface, enabling attackers with Job/Configure permission to exploit a stored cross-site scripting vulnerability.

The Impact of CVE-2020-2113

The vulnerability can be exploited by malicious users with specific permissions to execute cross-site scripting attacks, potentially compromising the integrity of the Jenkins environment.

Technical Details of CVE-2020-2113

The technical aspects of the CVE-2020-2113 vulnerability are as follows:

Vulnerability Description

Jenkins Git Parameter Plugin 0.9.11 and earlier versions do not escape the default value displayed on the UI, leading to a stored cross-site scripting vulnerability.

Affected Systems and Versions

Product: Jenkins Git Parameter Plugin
Vendor: Jenkins project
Vulnerable Versions:
0.9.4 (custom version)
<= 0.9.11 (custom version)

Exploitation Mechanism

Attackers with Job/Configure permission can exploit the vulnerability by injecting malicious scripts into the default value field, leading to stored cross-site scripting attacks.

Mitigation and Prevention

Protect your systems from CVE-2020-2113 with the following measures:

Immediate Steps to Take

Upgrade Jenkins Git Parameter Plugin to a non-vulnerable version.
Implement strict input validation to prevent script injection.
Restrict Job/Configure permissions to trusted users only.

Long-Term Security Practices

Regularly update Jenkins and its plugins to the latest secure versions.
Conduct security training for users to raise awareness about cross-site scripting vulnerabilities.

Patching and Updates

Apply patches provided by Jenkins project promptly to address the vulnerability and enhance system security.