What is CVE-2021-22240?

CVE-2021-22240 is a medium-severity vulnerability in GitLab, classified under Incorrect Authorization. CVSS score: 4.2/10. Published 2021-08-05.

How severe is CVE-2021-22240?

Medium severity. CVSS v3 base score is 4.2 out of 10.

Auth bypass in GitLab

CVE-2021-22240

Improper access control in GitLab EE versions 13.11.6, 13.12.6, and 14.0.2 allows users to be created via single sign on despite user cap being enabled

Vulnerability class: Broken Access Control

Published 2021-08-05 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 4.2 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:N.

EPSS exploit prediction

EPSS: 0.007 (49.7th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 50th percentile — 49.7% 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
GitLab Ee — versions >=13.7, <13.11.6, >=13.12, <13.12.6, >=14.0, <14.0.2

Weakness classification (CWE)

CWE-863 — Incorrect Authorization

References

gitlab.com/gitlab-org/gitlab/-/issues/327641 (Broken Link)
hackerone.com/reports/1166566 (Permissions Required, Third Party Advisory)
gitlab.com/gitlab-org/cves/-/blob/master/2021/CVE-2021-22240.json (Vendor Advisory)

Frequently asked questions

What is CVE-2021-22240?: CVE-2021-22240 is a medium-severity vulnerability in GitLab, classified under Incorrect Authorization. CVSS score: 4.2/10. Published 2021-08-05.
How severe is CVE-2021-22240?: Medium severity. CVSS v3 base score is 4.2 out of 10.