CVE-2020-13308 Denial of service in GitLab
Attackers can deny service to users without 2FA by inviting them to projects enforcing 2FA inheritance, locking them out of GitLab.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2020-13308?
CVE-2020-13308 is a low-severity denial of service vulnerability in Gitlab Gitlab, published on 15 Sep 2020. An attacker needs administrator access to exploit it, with no action from the victim.
Official description
A vulnerability was discovered in GitLab versions before 13.1.10, 13.2.8 and 13.3.4. A user without 2 factor authentication enabled could be prohibited from accessing GitLab by being invited into a project that had 2 factor authentication inheritance.
Weakness: CWE-281
Which versions are affected by CVE-2020-13308?
1 open source package ship an affected version, including gitlab. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
gitlab Bitnami | From 1.0.0 | 13.1.10, 13.2.8, 13.3.4 |
Products include Gitlab Gitlab.
How do I fix CVE-2020-13308?
Upgrade gitlab to a fixed version for your release line: 13.1.10, 13.2.8 or 13.3.4.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2020-13308 being exploited?
There is no known exploitation of CVE-2020-13308 in the wild and no public exploit code.
Other vulnerabilities in Gitlab Gitlab
- CVE-2026-97229 GitLab Community Edition and Enterprise Edition Integer Overflow or Wraparound
- CVE-2026-85706 GitLab Community Edition and Enterprise Edition Path Traversal
- CVE-2023-7028 GitLab Community and Enterprise Editions Improper Access Control
- CVE-2021-22205 GitLab Community and Enterprise Editions Remote Code Execution
- CVE-2021-39935 GitLab Community and Enterprise Editions Server-Side Request Forgery (SSRF)
Sources
Also known as BIT-gitlab-2020-13308, GHSA-6fvc-pc2f-vcp7, UBUNTU-CVE-2020-13308.