What is CVE-2020-13345?

CVE-2020-13345 is a medium-severity vulnerability in GitLab, classified under Cross-site Scripting. CVSS score: 5.5/10. Published 2020-10-06.

How severe is CVE-2020-13345?

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

XSS in GitLab

CVE-2020-13345

An issue has been discovered in GitLab affecting all versions starting from 10.8. Reflected XSS on Multiple Routes

Vulnerability class: XSS (Cross-Site Scripting)

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

CVSS v3 metric

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

EPSS exploit prediction

EPSS: 0.009 (57.7th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 58th percentile — 57.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.009 · newest: 0.009 · change: 0.000

Affected products

GitLab — versions >=10.8, <13.2.10, >=13.3.0, <13.3.7, >=13.4.0, <13.4.2

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

gitlab.com/gitlab-org/gitlab/-/issues/232829 (Broken Link)
hackerone.com/reports/946728 (Permissions Required, Exploit, Third Party Advisory)
gitlab.com/gitlab-org/cves/-/blob/master/2020/CVE-2020-13345.json (Vendor Advisory)

Frequently asked questions

What is CVE-2020-13345?: CVE-2020-13345 is a medium-severity vulnerability in GitLab, classified under Cross-site Scripting. CVSS score: 5.5/10. Published 2020-10-06.
How severe is CVE-2020-13345?: Medium severity. CVSS v3 base score is 5.5 out of 10.