What is CVE-2021-22242?

CVE-2021-22242 is a high-severity vulnerability in Gitlab, classified under Cross-site Scripting. CVSS score: 8.7/10. Published 2021-08-25.

How severe is CVE-2021-22242?

High severity. CVSS v3 base score is 8.7 out of 10.

XSS in Gitlab

CVE-2021-22242

Insufficient input sanitization in Mermaid markdown in GitLab CE/EE version 11.4 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: 0.636 (99.1th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 8.7 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:N.

Affected products

Gitlab — versions >=11.4, <13.12.9, >=14.0, <14.0.7, >=14.1, <14.1.2

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

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

Frequently asked questions

What is CVE-2021-22242?: CVE-2021-22242 is a high-severity vulnerability in Gitlab, classified under Cross-site Scripting. CVSS score: 8.7/10. Published 2021-08-25.
How severe is CVE-2021-22242?: High severity. CVSS v3 base score is 8.7 out of 10.