GitLab is prone to an HTML injection vulnerability.
Successful exploits will allow attacker-supplied HTML and script code to run in the context of the affected browser, potentially allowing the attacker to steal cookie-based authentication credentials or to control how the site is rendered to the user. Other attacks are also possible.
Information
Gitlab GitLab Enterprise Edition 11.4
Gitlab GitLab Enterprise Edition 11.3
Gitlab GitLab Community Edition 11.5
Gitlab GitLab Community Edition 11.4
Gitlab GitLab Community Edition 11.3
Gitlab GitLab Enterprise Edition 11.4.8
Gitlab GitLab Enterprise Edition 11.3.11
Gitlab GitLab Community Edition 11.5.1
Gitlab GitLab Community Edition 11.4.8
Gitlab GitLab Community Edition 11.3.11
Exploit
The researcher has created a proof-of-concept to demonstrate the issue. Please see the references for more information.
References:
- GitLab Home Page (GitLab.com)
- GitLab Security Release: 11.5.1, 11.4.8, and 11.3.11 ()
- Stored XSS for Environments (GitLab)