CVE-2021-22183 : Security Advisory and Response

GitLab versions starting from 11.8 were vulnerable to a stored XSS issue on the epics page, allowing exploitation through user interactions.

Understanding CVE-2021-22183

This CVE pertains to an improper neutralization of input during web page generation, leading to a cross-site scripting vulnerability in GitLab.

What is CVE-2021-22183?

CVE-2021-22183 is a security issue affecting GitLab versions from 11.8 onwards. The vulnerability allowed for stored XSS on the epics page.

The Impact of CVE-2021-22183

The impact of this CVE is rated as MEDIUM with a CVSS base score of 4.1. It required low privileges and user interaction to be exploited.

Technical Details of CVE-2021-22183

This section outlines the key technical aspects of the GitLab vulnerability.

Vulnerability Description

The vulnerability involved improper neutralization of input, resulting in a stored XSS on the epics page in affected GitLab versions.

Affected Systems and Versions

GitLab versions >=11.8 and <13.8.2, >=13.7 and <13.7.6, and >=11.8 and <13.6.6 were impacted by this vulnerability.

Exploitation Mechanism

To exploit this issue, an attacker needed to interact with users to trigger the stored XSS in the epics page.

Mitigation and Prevention

Protecting your systems from CVE-2021-22183 involves taking immediate action and implementing long-term security practices.

Immediate Steps to Take

Users are advised to update their GitLab instances to versions that contain fixes for this vulnerability immediately.

Long-Term Security Practices

Incorporate secure coding practices and regular security audits to prevent similar vulnerabilities in the future.

Patching and Updates

Regularly check for security updates from GitLab and apply patches promptly to address known vulnerabilities.