What is CVE-2020-13337?

CVE-2020-13337 is a high-severity vulnerability in GitLab, classified under Cross-site Scripting. CVSS score: 7.2/10. Published 2020-10-02.

How severe is CVE-2020-13337?

High severity. CVSS v3 base score is 7.2 out of 10.

XSS in GitLab

CVE-2020-13337

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.

Vulnerability class: XSS (Cross-Site Scripting)

Published 2020-10-02 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.2 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.008 (53.2th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 53rd percentile — 53.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.008 · newest: 0.008 · change: 0.000

Affected products

GitLab — versions >=12.10, <12.10.13

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

gitlab.com/gitlab-org/gitlab/-/issues/199049 (Broken Link)
gitlab.com/gitlab-org/cves/-/blob/master/2020/CVE-2020-13337.json (Third Party Advisory)

Frequently asked questions

What is CVE-2020-13337?: CVE-2020-13337 is a high-severity vulnerability in GitLab, classified under Cross-site Scripting. CVSS score: 7.2/10. Published 2020-10-02.
How severe is CVE-2020-13337?: High severity. CVSS v3 base score is 7.2 out of 10.