An issue was discovered in GitLab Community and Enterprise Edition 8.13 through 11.11. Non-member users who subscribed to issue notifications could access the title of confidential issues through the unsubscription page. It allows Information Disclosure.
An issue was discovered in GitLab Community and Enterprise Edition 11.7 through 11.11. It has Improper Input Validation. Restricted visibility settings allow creating internal projects in private groups, leading to multiple permission issues.
An issue was discovered in GitLab Community and Enterprise Edition 10.6 through 11.11. Users could guess the URL slug of private projects through the contrast of the destination URLs of issues linked in comments. It allows Information Disclosure.
Unauthorized Access to the Container Registry of other groups was discovered in GitLab Enterprise 12.0.0-pre. In other words, authenticated remote attackers can read Docker registries of other groups. When a legitimate user changes the path of a group, Docker registries are not adapted, leaving them in the old namespace. They are not protected and are available to all other users with no previous access to the repo.
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.