CVE-2021-22199 : Exploit Details and Defense Strategies

An issue has been discovered in GitLab affecting all versions starting with 12.9. GitLab was vulnerable to a stored XSS if scoped labels were used.

Understanding CVE-2021-22199

This CVE affects GitLab versions >=12.9 and <13.10.1, >=13.9.0 and <13.9.5, and >=12.9 and <13.8.7.

What is CVE-2021-22199?

CVE-2021-22199 is a vulnerability in GitLab that allows for stored XSS if scoped labels are used, impacting various versions of the software.

The Impact of CVE-2021-22199

The vulnerability has a low severity base score of 3.5, with a low impact on confidentiality and integrity, requiring user interaction for exploitation.

Technical Details of CVE-2021-22199

This section provides more insights into the vulnerability.

Vulnerability Description

The issue arises due to improper neutralization of input during web page generation in GitLab, leading to stored XSS.

Affected Systems and Versions

GitLab versions >=12.9 and <13.10.1, >=13.9.0 and <13.9.5, and >=12.9 and <13.8.7 are affected by this vulnerability.

Exploitation Mechanism

Attackers can exploit this vulnerability through network access, low attack complexity, and low privileges required.

Mitigation and Prevention

Understanding how to mitigate and prevent the exploitation of CVE-2021-22199 is essential.

Immediate Steps to Take

Users should update GitLab to versions higher than 13.10.1, 13.9.5, and 13.8.7 to address this vulnerability.

Long-Term Security Practices

Implement secure coding practices, conduct regular security audits, and educate users on safe label usage to enhance security.

Patching and Updates

Regularly monitor GitLab security advisories and apply patches promptly to protect against known vulnerabilities.