XSS in Gitlab

CVE-2021-39885

A Stored XSS in merge request creation page in all versions of Gitlab EE starting from 13.7 before 14.1.7, all versions starting from 14.2 before 14.2.5, and all versions starting from 14.3 before 14.3.1 allows an attacker to execute arbitrary JavaScript code on the victim's behalf via malicious approval rule names

Vulnerability class: XSS (Cross-Site Scripting)

EPSS: 0.010 (58.7th 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 >=13.7, <14.1.7, >=14.3, <14.3.1, >=14.2, <14.2.5

Weakness classification (CWE)

References

  • cve@gitlab.com (Exploit, x_refsource_MISC, Issue Tracking, Vendor Advisory)
  • cve@gitlab.com (Permissions Required, Exploit, Third Party Advisory, x_refsource_MISC)
  • cve@gitlab.com (x_refsource_CONFIRM, Vendor Advisory)

Frequently asked questions

What is CVE-2021-39885?
CVE-2021-39885 is a high-severity vulnerability in Gitlab, classified under Cross-site Scripting. CVSS score: 8.7/10. Published 2021-10-04.
How severe is CVE-2021-39885?
High severity. CVSS v3 base score is 8.7 out of 10.