What is CVE-2021-22254?

CVE-2021-22254 is a low-severity vulnerability in GitLab, classified under Improper Encoding or Escaping of Output. CVSS score: 3.1/10. Published 2021-08-20.

How severe is CVE-2021-22254?

Low severity. CVSS v3 base score is 3.1 out of 10.

Vulnerability in GitLab

CVE-2021-22254

Under very specific conditions a user could be impersonated using Gitlab shell. This vulnerability affects GitLab CE/EE 13.1 and later through 14.1.2, 14.0.7 and 13.12.9.

Published 2021-08-20 · last modified 2026-06-17.

CVSS v3 metric

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

EPSS exploit prediction

EPSS: 0.009 (57.2th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 57th percentile — 57.2% 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 >=13.1, <13.12.9, >=14.0, <14.0.7, >=14.1, <14.1.2

Weakness classification (CWE)

CWE-116 — Improper Encoding or Escaping of Output

References

gitlab.com/gitlab-org/gitlab/-/issues/300265 (Broken Link)
hackerone.com/reports/1087806 (Permissions Required, Third Party Advisory)
gitlab.com/gitlab-org/cves/-/blob/master/2021/CVE-2021-22254.json (Vendor Advisory)

Frequently asked questions

What is CVE-2021-22254?: CVE-2021-22254 is a low-severity vulnerability in GitLab, classified under Improper Encoding or Escaping of Output. CVSS score: 3.1/10. Published 2021-08-20.
How severe is CVE-2021-22254?: Low severity. CVSS v3 base score is 3.1 out of 10.