XSS in Gitlab

CVE-2021-22220

An issue has been discovered in GitLab affecting all versions starting with 13.10. GitLab was vulnerable to a stored XSS in blob viewer of notebooks.

Vulnerability class: XSS (Cross-Site Scripting)

EPSS: 0.007 (50.9th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 6.1 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N.

Affected products

Gitlab — versions >=13.12, <13.12.2, >=13.11, <13.11.5, >=13.10, <13.10.5

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

cve@gitlab.com (x_refsource_MISC, Broken Link)
cve@gitlab.com (Permissions Required, x_refsource_MISC)
cve@gitlab.com (x_refsource_CONFIRM, Third Party Advisory)

Frequently asked questions

What is CVE-2021-22220?: CVE-2021-22220 is a medium-severity vulnerability in Gitlab, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2021-06-08.
How severe is CVE-2021-22220?: Medium severity. CVSS v3 base score is 6.1 out of 10.