What is CVE-2021-39887?

CVE-2021-39887 is a high-severity vulnerability in Gitlab, classified under Cross-site Scripting. CVSS score: 7.3/10. Published 2021-10-05.

How severe is CVE-2021-39887?

High severity. CVSS v3 base score is 7.3 out of 10.

XSS in Gitlab

CVE-2021-39887

A stored Cross-Site Scripting vulnerability in the GitLab Flavored Markdown in GitLab CE/EE version 8.4 and above allowed an attacker to execute arbitrary JavaScript code on the victim's behalf.

Vulnerability class: XSS (Cross-Site Scripting)

EPSS: 0.008 (54.0th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.3 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:N.

Affected products

Gitlab — versions >=8.4, <14.1.7, >=14.2, <14.2.5, >=14.3, <14.3.1

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-2021-39887?: CVE-2021-39887 is a high-severity vulnerability in Gitlab, classified under Cross-site Scripting. CVSS score: 7.3/10. Published 2021-10-05.
How severe is CVE-2021-39887?: High severity. CVSS v3 base score is 7.3 out of 10.