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)

EPSS: 0.006 (43.0th percentile) — read the EPSS interpretation.

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.

Affected products

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

Weakness classification (CWE)

Public proof-of-concept exploits

References

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.