An issue was discovered in GitLab Community and Enterprise Edition 8.13 through 11.11. Restricted users could access the metadata of private milestones through the Search API. It has Improper Access Control.
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 information disclosure issue was discovered in GitLab CE/EE 8.14 and later, by using the move issue feature which could result in disclosure of the newly created issue ID.