The host is installed with GitLab CE/EE 12.6 before 15.2.5, 15.3 before 15.3.4 or 15.4 before 15.4.1 and is prone to a information exposure vulnerability. A flaw is present in the application, which fails to properly handle GitHub integration's access token. Successful exploitation allows a malicious maintainer could exfiltrate a GitHub integration's access token by modifying the integration URL such that authenticated requests are sent to an attacker controlled server.