CVE-2021-39893 Missing authorization in GitLab
Unauthenticated attackers can trigger denial of service and read data by parsing files without authorization 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-2021-39893?
CVE-2021-39893 is a medium-severity missing authorization vulnerability in Gitlab Gitlab, published on 5 Oct 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
A potential DOS vulnerability was discovered in GitLab starting with version 9.1 that allowed parsing files without authorisation.
Weakness: CWE-862
Which versions are affected by CVE-2021-39893?
1 open source package ship an affected version, including gitlab. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
gitlab Bitnami | From 9.1.0 | 14.1.7, 14.2.5, 14.3.1 |
Products include Gitlab Gitlab.
How do I fix CVE-2021-39893?
Upgrade gitlab to a fixed version for your release line: 14.1.7, 14.2.5 or 14.3.1.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2021-39893 being exploited?
There is no known exploitation of CVE-2021-39893 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-2021-39893, GHSA-mvf7-889j-9c49, UBUNTU-CVE-2021-39893.