What is CVE-2020-13301?

CVE-2020-13301 is a medium-severity vulnerability in GitLab, classified under Cross-site Scripting. CVSS score: 5.5/10. Published 2020-09-14.

How severe is CVE-2020-13301?

Medium severity. CVSS v3 base score is 5.5 out of 10.

XSS in GitLab

CVE-2020-13301

A vulnerability was discovered in GitLab versions before 13.1.10, 13.2.8 and 13.3.4. GitLab was vulnerable to a stored XSS on the standalone vulnerability page.

Vulnerability class: XSS (Cross-Site Scripting)

Published 2020-09-14 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 5.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:L/A:N.

EPSS exploit prediction

EPSS: 0.011 (65.4th percentile), scored 2026-09-29.

Low probability of exploitation in the next 30 days, but still tracked. 65th percentile — 65.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.011 · newest: 0.011 · change: 0.000

Affected products

GitLab — versions >=12.10, <13.1.10, >=13.2, <13.2.8, >=13.3, <13.3.4

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

gitlab.com/gitlab-org/gitlab/-/issues/219378 (Broken Link)
hackerone.com/reports/882988 (Permissions Required)
gitlab.com/gitlab-org/cves/-/blob/master/2020/CVE-2020-13301.json (Third Party Advisory)

Frequently asked questions

What is CVE-2020-13301?: CVE-2020-13301 is a medium-severity vulnerability in GitLab, classified under Cross-site Scripting. CVSS score: 5.5/10. Published 2020-09-14.
How severe is CVE-2020-13301?: Medium severity. CVSS v3 base score is 5.5 out of 10.