What is CVE-2021-22225?

CVE-2021-22225 is a medium-severity vulnerability in GitLab, classified under Cross-site Scripting. CVSS score: 4.7/10. Published 2021-07-07.

How severe is CVE-2021-22225?

Medium severity. CVSS v3 base score is 4.7 out of 10.

Is CVE-2021-22225 known to be exploited?

1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

XSS in GitLab

CVE-2021-22225

Insufficient input sanitization in markdown in GitLab version 13.11 and up allows an attacker to exploit a stored cross-site scripting vulnerability via a specially-crafted markdown

Vulnerability class: XSS (Cross-Site Scripting)

Published 2021-07-07 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 4.7 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:L/A:N.

EPSS exploit prediction

EPSS: 0.006 (44.1th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 44th percentile — 44.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.006 · newest: 0.006 · change: 0.000

Affected products

GitLab — versions >=13.11.3, <13.11.6, >=13.12, <13.12.6, >=14.0, <14.0.2

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

Public proof-of-concept exploits

cokeBeer/goot

References

gitlab.com/gitlab-org/gitlab/-/issues/331051 (Broken Link)
gitlab.com/gitlab-org/cves/-/blob/master/2021/CVE-2021-22225.json (Vendor Advisory)

Frequently asked questions

What is CVE-2021-22225?: CVE-2021-22225 is a medium-severity vulnerability in GitLab, classified under Cross-site Scripting. CVSS score: 4.7/10. Published 2021-07-07.
How severe is CVE-2021-22225?: Medium severity. CVSS v3 base score is 4.7 out of 10.
Is CVE-2021-22225 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.