An issue was discovered in GitLab Enterprise Edition and Community Edition 1.10 through 12.0.2. The GitLab graphql service was vulnerable to multiple authorization issues that disclosed restricted user, group, and repository metadata to unauthorized users. It has Incorrect Access Control.
GitLab 12.2.2 and below contains a security vulnerability that allows a guest user in a private project to see the merge request ID associated to an issue via the activity timeline.