What is CVE-2021-22172?

CVE-2021-22172 is a medium-severity vulnerability in GitLab, classified under Information Disclosure. CVSS score: 4.3/10. Published 2021-03-26.

How severe is CVE-2021-22172?

Medium severity. CVSS v3 base score is 4.3 out of 10.

Information disclosure in GitLab

CVE-2021-22172

Improper authorization in GitLab 12.8+ allows a guest user in a private project to view tag data that should be inaccessible on the releases page

Vulnerability class: Information Disclosure

Published 2021-03-26 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 4.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N.

EPSS exploit prediction

EPSS: 0.010 (62.3th percentile), scored 2026-10-07.

Low probability of exploitation in the next 30 days, but still tracked. 62nd percentile — 62.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.010 · newest: 0.010 · change: 0.000

Affected products

GitLab — versions >=12.8, <13.6.6, >=13.7.0, <13.7.6, >=13.8.0, <13.8.2

Weakness classification (CWE)

CWE-200 — Information Disclosure

References

gitlab.com/gitlab-org/gitlab/-/issues/212911 (Exploit, Patch, Issue Tracking, Vendor Advisory)
hackerone.com/reports/833334 (Permissions Required, Third Party Advisory)
gitlab.com/gitlab-org/cves/-/blob/master/2021/CVE-2021-22172.json (Vendor Advisory)

Frequently asked questions

What is CVE-2021-22172?: CVE-2021-22172 is a medium-severity vulnerability in GitLab, classified under Information Disclosure. CVSS score: 4.3/10. Published 2021-03-26.
How severe is CVE-2021-22172?: Medium severity. CVSS v3 base score is 4.3 out of 10.