What is CVE-2019-20143?

CVE-2019-20143 is a medium-severity vulnerability in GitLab, classified under Missing Authentication for Critical Function. CVSS score: 5.3/10. Published 2020-01-13.

How severe is CVE-2019-20143?

Medium severity. CVSS v3 base score is 5.3 out of 10.

Auth bypass in GitLab

CVE-2019-20143

An issue was discovered in GitLab Community Edition (CE) and Enterprise Edition (EE) 12.6. It has Incorrect Access Control.

Vulnerability class: Broken Authentication

Published 2020-01-13 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N.

EPSS exploit prediction

EPSS: 0.009 (57.8th percentile), scored 2026-10-07.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 58th percentile — 57.8% 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 12.6.0

Weakness classification (CWE)

CWE-306 — Missing Authentication for Critical Function

References

about.gitlab.com/blog/categories/releases/ (Release Notes, Vendor Advisory)
about.gitlab.com/releases/2020/01/02/security-release-gitlab-12-6-2-released/ (Release Notes, Vendor Advisory)

Frequently asked questions

What is CVE-2019-20143?: CVE-2019-20143 is a medium-severity vulnerability in GitLab, classified under Missing Authentication for Critical Function. CVSS score: 5.3/10. Published 2020-01-13.
How severe is CVE-2019-20143?: Medium severity. CVSS v3 base score is 5.3 out of 10.