Thanks [joaxcar](https://hackerone.com/joaxcar) for reporting this vulnerability through our HackerOne bug bounty program

Missing sanitization of data in Pipeline error messages in GitLab CE/EE affecting all versions starting from 1.0.2 before 14.8.6, all versions from 14.9.0 before 14.9.4, and all versions from 14.10.0 before 14.10.1 allows for rendering of attacker control

Improper neutralization of user input in GitLab CE/EE versions 14.4 before 14.7.7, all versions starting from 14.8 before 14.8.5, all versions starting from 14.9 before 14.9.2 allowed an attacker to exploit XSS by injecting HTML in notes.

Missing sanitization of HTML attributes in Jupyter notebooks in all versions of GitLab CE/EE since version 14.5 allows an attacker to perform arbitrary HTTP POST requests on a user's behalf leading to potential account takeover