What is CVE-2021-22237?

CVE-2021-22237 is a medium-severity vulnerability in GitLab, classified under Session Fixation. CVSS score: 6.6/10. Published 2021-08-25.

How severe is CVE-2021-22237?

Medium severity. CVSS v3 base score is 6.6 out of 10.

Vulnerability in GitLab

CVE-2021-22237

Under specialized conditions, GitLab may allow a user with an impersonation token to perform Git actions even if impersonation is disabled. This vulnerability is present in GitLab CE/EE versions before 13.12.9, 14.0.7, 14.1.2

Published 2021-08-25 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 6.6 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.008 (56.3th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 56th percentile — 56.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.008 · newest: 0.008 · change: 0.000

Affected products

GitLab — versions >=13.1, <13.12.9, >=14.0, <14.0.7, >=14.1, <14.1.2

Weakness classification (CWE)

CWE-384 — Session Fixation

References

gitlab.com/gitlab-org/gitlab/-/issues/297516 (Broken Link)
gitlab.com/gitlab-org/cves/-/blob/master/2021/CVE-2021-22237.json (Vendor Advisory)

Frequently asked questions

What is CVE-2021-22237?: CVE-2021-22237 is a medium-severity vulnerability in GitLab, classified under Session Fixation. CVSS score: 6.6/10. Published 2021-08-25.
How severe is CVE-2021-22237?: Medium severity. CVSS v3 base score is 6.6 out of 10.