CVE-2020-13337 Cross-site scripting in GitLab
Attackers can inject stored XSS payloads via group names in GitLab, potentially leading to session hijacking or malicious script execution.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2020-13337?
CVE-2020-13337 is a high-severity cross-site scripting vulnerability in Gitlab Gitlab, published on 2 Oct 2020. An attacker needs administrator access to exploit it, with no action from the victim.
Official description
An issue has been discovered in GitLab affecting versions from 12.10 to 12.10.12 that allowed for a stored XSS payload to be added as a group name.
Weakness: CWE-79
Which versions are affected by CVE-2020-13337?
1 open source package ship an affected version, including gitlab. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
gitlab Bitnami | From 12.10.0 | 12.10.13 |
Products include Gitlab Gitlab.
How do I fix CVE-2020-13337?
Upgrade gitlab to 12.10.13 or later.
Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.
Is CVE-2020-13337 being exploited?
There is no known exploitation of CVE-2020-13337 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-2020-13337, GHSA-26jg-48xv-2wqr, UBUNTU-CVE-2020-13337.