CVE-2021-39943 Missing authorization in GitLab
An authorization logic error in GitLab EE allows users to improperly update external status check statuses via the API.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2021-39943?
CVE-2021-39943 is a medium-severity missing authorization vulnerability in Gitlab Gitlab, published on 9 Feb 2022. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
An authorization logic error in the External Status Check API in GitLab EE affecting all versions starting from 14.1 before 14.3.6, all versions starting from 14.4 before 14.4.4, all versions starting from 14.5 before 14.5.2, allowed a user to update the status of the check via an API call
Weakness: CWE-863
Which versions are affected by CVE-2021-39943?
1 open source package ship an affected version, including gitlab. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
gitlab Bitnami | From 14.1.0 | 14.3.6, 14.4.4, 14.5.2 |
Products include Gitlab Gitlab.
How do I fix CVE-2021-39943?
Upgrade gitlab to a fixed version for your release line: 14.3.6, 14.4.4 or 14.5.2.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2021-39943 being exploited?
There is no known exploitation of CVE-2021-39943 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-2021-39943, GHSA-2hjx-qmr7-gg4r.