CVE-2019-15739 Cross-site scripting in n/a
Attackers can execute arbitrary scripts in victim browsers via unsanitized Markdown payloads in GitLab, potentially leading to session hijacking.
- 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
- None listed
What is CVE-2019-15739?
CVE-2019-15739 is a medium-severity cross-site scripting vulnerability in Gitlab Gitlab, published on 16 Sep 2019. 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 was discovered in GitLab Community and Enterprise Edition 8.1 through 12.2.1. Certain areas displaying Markdown were not properly sanitizing some XSS payloads.
Weakness: CWE-79
Which versions are affected by CVE-2019-15739?
It affects 1 product.
Products include Gitlab Gitlab.
How do I fix CVE-2019-15739?
No fix has been published for CVE-2019-15739 yet. Limit exposure of the affected software until one is available.
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-2019-15739 being exploited?
There is no known exploitation of CVE-2019-15739 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 GHSA-3cjm-23gg-86mm, UBUNTU-CVE-2019-15739.