What is CVE-2020-13289?

CVE-2020-13289 is a medium-severity vulnerability in GitLab, classified under Missing Authentication for Critical Function. CVSS score: 5.4/10. Published 2020-09-14.

How severe is CVE-2020-13289?

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

Auth bypass in GitLab

CVE-2020-13289

A vulnerability was discovered in GitLab versions before 13.1.10, 13.2.8 and 13.3.4. In certain cases an invalid username could be accepted when 2FA is activated.

Vulnerability class: Broken Authentication

Published 2020-09-14 · 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:N/S:U/C:L/I:L/A:N.

EPSS exploit prediction

EPSS: 0.007 (50.7th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 51st percentile — 50.7% 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 >=8.7, <13.1.10, >=13.2, <13.2.8, >=13.3, <13.3.4

Weakness classification (CWE)

CWE-306 — Missing Authentication for Critical Function

References

gitlab.com/gitlab-org/gitlab/-/issues/20302 (Broken Link)
gitlab.com/gitlab-org/cves/-/blob/master/2020/CVE-2020-13289.json (Vendor Advisory)

Frequently asked questions

What is CVE-2020-13289?: CVE-2020-13289 is a medium-severity vulnerability in GitLab, classified under Missing Authentication for Critical Function. CVSS score: 5.4/10. Published 2020-09-14.
How severe is CVE-2020-13289?: Medium severity. CVSS v3 base score is 5.4 out of 10.