CVE-2021-22220 Cross-site scripting in GitLab
An attacker can inject malicious scripts into GitLab notebooks via the blob viewer, potentially leading to session hijacking or code execution.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- Available
What is CVE-2021-22220?
CVE-2021-22220 is a medium-severity cross-site scripting vulnerability in Gitlab Gitlab, published on 8 Jun 2021. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official description
An issue has been discovered in GitLab affecting all versions starting with 13.10. GitLab was vulnerable to a stored XSS in blob viewer of notebooks.
Weakness: CWE-79
Which versions are affected by CVE-2021-22220?
1 open source package ship an affected version, including gitlab. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
gitlab Bitnami | From 13.10.0 | 13.10.5, 13.11.5, 13.12.2 |
Products include Gitlab Gitlab.
How do I fix CVE-2021-22220?
Upgrade gitlab to a fixed version for your release line: 13.10.5, 13.11.5 or 13.12.2.
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-2021-22220 being exploited?
There is no known exploitation of CVE-2021-22220 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-2021-22220, GHSA-jr4h-pv5f-qr33.