GitLab 12.5 through 12.8.1 allows HTML Injection. A particular error header was potentially susceptible to injection or potentially other vulnerabilities via unescaped input.
GitLab EE 3.0 through 12.8.1 allows SSRF. An internal investigation revealed that a particular deprecated service was creating a server side request forgery risk.
GitLab EE 12.4.2 through 12.8.1 allows Denial of Service. It was internally discovered that a potential denial of service involving permissions checks could impact a project home page.
GitLab 10.1 through 12.8.1 has Incorrect Access Control. A scenario was discovered in which a GitLab account could be taken over through an expired link.
GitLab EE 11.6 through 12.8.1 allows Information Disclosure. Sending a specially crafted request to the vulnerability_feedback endpoint could result in the exposure of a private project namespace