The host is installed with GitLab CE/EE 13.11 before 15.8.5, 15.9 before 15.9.4, 15.10 before 15.10.1 and is prone to an information disclosure vulnerability. A flaw is present in the application, which fails to properly handle the exposure of resource to wrong sphere. Successful exploitation allows for an attacker to cause a user role, who is a project member demoted previously, to read project updates by doing a diff with a pre-existing fork.