CVE-2020-13334 Missing authorization in GitLab
Non-members can modify issue confidentiality via GraphQL due to improper authorization checks in GitLab.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2020-13334?
CVE-2020-13334 is a medium-severity missing authorization vulnerability in Gitlab Gitlab, published on 7 Oct 2020. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
In GitLab versions prior to 13.2.10, 13.3.7 and 13.4.2, improper authorization checks allow a non-member of a project/group to change the confidentiality attribute of issue via mutation GraphQL query
Weakness: CWE-863
Which versions are affected by CVE-2020-13334?
1 open source package ship an affected version, including gitlab. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
gitlab Bitnami | From 8.6.0 | 13.2.10, 13.3.7, 13.4.2 |
Products include Gitlab Gitlab.
How do I fix CVE-2020-13334?
Upgrade gitlab to a fixed version for your release line: 13.2.10, 13.3.7 or 13.4.2.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2020-13334 being exploited?
There is no known exploitation of CVE-2020-13334 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-2020-13334, GHSA-2px3-3vqh-4m6q, UBUNTU-CVE-2020-13334.