CVE-2021-39902 Missing authorization in GitLab
A guest user can modify incident severity due to incorrect authorization checks in GitLab.
- 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-2021-39902?
CVE-2021-39902 is a medium-severity missing authorization vulnerability in Gitlab Gitlab, published on 4 Nov 2021. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
Incorrect Authorization in GitLab CE/EE 13.4 or above allows a user with guest membership in a project to modify the severity of an incident.
Weakness: CWE-863
Which versions are affected by CVE-2021-39902?
1 open source package ship an affected version, including gitlab. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
gitlab Bitnami | From 13.4.0 | 14.2.6, 14.3.4, 14.4.1 |
Products include Gitlab Gitlab.
How do I fix CVE-2021-39902?
Upgrade gitlab to a fixed version for your release line: 14.2.6, 14.3.4 or 14.4.1.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2021-39902 being exploited?
There is no known exploitation of CVE-2021-39902 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-2021-39902, GHSA-8f66-6ff4-3fj6, UBUNTU-CVE-2021-39902.