What is CVE-2020-13331?

CVE-2020-13331 is a medium-severity vulnerability in GitLab, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2020-09-30.

How severe is CVE-2020-13331?

Medium severity. CVSS v3 base score is 5.4 out of 10.

XSS in GitLab

CVE-2020-13331

An issue has been discovered in GitLab affecting versions prior to 12.10.13. GitLab was vulnerable to a stored XSS by in the Wiki pasges.

Vulnerability class: XSS (Cross-Site Scripting)

Published 2020-09-30 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 5.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N.

EPSS exploit prediction

EPSS: 0.007 (50.3th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 50th percentile — 50.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.007 · newest: 0.007 · change: 0.000

Affected products

GitLab — versions <12.10.13

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

gitlab.com/gitlab-org/gitlab/-/issues/219010 (Exploit, Vendor Advisory)
gitlab.com/gitlab-org/cves/-/blob/master/2020/CVE-2020-13331.json (Vendor Advisory)

Frequently asked questions

What is CVE-2020-13331?: CVE-2020-13331 is a medium-severity vulnerability in GitLab, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2020-09-30.
How severe is CVE-2020-13331?: Medium severity. CVSS v3 base score is 5.4 out of 10.