CVE-2021-21668 : Security Advisory and Response

Jenkins Scriptler Plugin version 3.1 and earlier has a stored cross-site scripting (XSS) vulnerability that allows attackers with Scriptler/Configure permission to exploit it.

Understanding CVE-2021-21668

This CVE pertains to a security issue in Jenkins Scriptler Plugin, impacting versions up to 3.1.

What is CVE-2021-21668?

CVE-2021-21668 involves a stored cross-site scripting vulnerability in Jenkins Scriptler Plugin 3.1 and earlier versions.

The Impact of CVE-2021-21668

This vulnerability can be exploited by attackers with Scriptler/Configure permission to execute malicious scripts on the affected system, potentially leading to unauthorized actions.

Technical Details of CVE-2021-21668

This section covers specific technical information related to the vulnerability.

Vulnerability Description

The vulnerability in Jenkins Scriptler Plugin 3.1 and earlier occurs due to the lack of proper escaping of script content, allowing malicious scripts to be stored and executed.

Affected Systems and Versions

Jenkins Scriptler Plugin versions up to 3.1 are impacted by this vulnerability.

Exploitation Mechanism

Attackers with Scriptler/Configure permission can exploit this vulnerability by injecting and executing malicious scripts through the affected plugin.

Mitigation and Prevention

To secure systems from CVE-2021-21668, certain measures need to be implemented.

Immediate Steps to Take

Users are advised to update Jenkins Scriptler Plugin to a version beyond 3.1, which contains fixes for this vulnerability. Additionally, restricting Scriptler/Configure permissions can help mitigate the risk.

Long-Term Security Practices

In the long term, organizations should enforce secure coding practices, conduct regular security audits, and stay updated with security advisories from Jenkins project.

Patching and Updates

It is crucial to regularly apply security patches and updates released by Jenkins project to address known vulnerabilities and enhance the overall security posture.