CVE-2020-13340 Cross-site scripting in GitLab
Stored XSS in GitLab CI Job Logs allows attackers to execute malicious scripts in victim browsers, potentially leading to account takeover.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- Available
What is CVE-2020-13340?
CVE-2020-13340 is a high-severity cross-site scripting vulnerability in Gitlab Gitlab, published on 8 Oct 2020. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.
Official description
An issue has been discovered in GitLab affecting all versions prior to 13.2.10, 13.3.7 and 13.4.2: Stored XSS in CI Job Log
Weakness: CWE-79
Which versions are affected by CVE-2020-13340?
1 open source package ship an affected version, including gitlab. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
gitlab Bitnami | From 12.4.0 | 13.2.10, 13.3.7, 13.4.2 |
Products include Gitlab Gitlab.
How do I fix CVE-2020-13340?
Upgrade gitlab to a fixed version for your release line: 13.2.10, 13.3.7 or 13.4.2.
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-2020-13340 being exploited?
There is no known exploitation of CVE-2020-13340 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-2020-13340, GHSA-2hgm-r8rh-g5xg, UBUNTU-CVE-2020-13340.