What is CVE-2019-15585?

CVE-2019-15585 is a critical-severity vulnerability in GitLab, classified under Improper Authentication. CVSS score: 9.8/10. Published 2020-01-28.

How severe is CVE-2019-15585?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Auth bypass in GitLab

CVE-2019-15585

Improper authentication exists in < 12.3.2, < 12.2.6, and < 12.1.12 for GitLab Community Edition (CE) and Enterprise Edition (EE) in the GitLab SAML integration had a validation issue that permitted an attacker to takeover another user's account.

Vulnerability class: Broken Authentication

Published 2020-01-28 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.016 (75.5th percentile), scored 2026-10-07.

Low probability of exploitation in the next 30 days, but still tracked. 76th percentile — 75.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.016 · newest: 0.016 · change: 0.000

Affected products

GitLab
GitLab Ce/ee — versions before 12.3.2, before 12.2.6, before 12.1.12

Weakness classification (CWE)

CWE-287 — Improper Authentication

References

about.gitlab.com/blog/2019/09/30/security-release-gitlab-12-dot-3-dot-2-release… (Vendor Advisory)
hackerone.com/reports/471323 (Permissions Required)

Frequently asked questions

What is CVE-2019-15585?: CVE-2019-15585 is a critical-severity vulnerability in GitLab, classified under Improper Authentication. CVSS score: 9.8/10. Published 2020-01-28.
How severe is CVE-2019-15585?: Critical severity. CVSS v3 base score is 9.8 out of 10.