What is CVE-2020-13339?

CVE-2020-13339 is a medium-severity vulnerability in GitLab, classified under Cross-site Scripting. CVSS score: 5.5/10. Published 2020-10-08.

How severe is CVE-2020-13339?

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

XSS in GitLab

CVE-2020-13339

An issue has been discovered in GitLab affecting all versions before 13.2.10, 13.3.7 and 13.4.2: XSS in SVG File Preview. Overall impact is limited due to the current user only being impacted.

Vulnerability class: XSS (Cross-Site Scripting)

Published 2020-10-08 · last modified 2026-06-17.

CVSS v3 metric

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

EPSS exploit prediction

EPSS: 0.008 (55.6th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 56th percentile — 55.6% 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, <13.2.10, >=13.3, <13.3.7, >=13.4, <13.4.2

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

gitlab.com/gitlab-org/gitlab/-/issues/118477 (Broken Link)
hackerone.com/reports/758653 (Permissions Required, Third Party Advisory)
gitlab.com/gitlab-org/cves/-/blob/master/2020/CVE-2020-13339.json (Vendor Advisory)

Frequently asked questions

What is CVE-2020-13339?: CVE-2020-13339 is a medium-severity vulnerability in GitLab, classified under Cross-site Scripting. CVSS score: 5.5/10. Published 2020-10-08.
How severe is CVE-2020-13339?: Medium severity. CVSS v3 base score is 5.5 out of 10.