Auth bypass in Gitlab

CVE-2021-39902

Incorrect Authorization in GitLab CE/EE 13.4 or above allows a user with guest membership in a project to modify the severity of an incident.

Vulnerability class: Broken Access Control

EPSS: 0.008 (51.6th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 4.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N.

Affected products

Gitlab — versions 14.4.0, >=13.4, <14.2.6, >=14.3, <14.3.4

Weakness classification (CWE)

CWE-863 — Incorrect Authorization

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-2021-39902?: CVE-2021-39902 is a medium-severity vulnerability in Gitlab, classified under Incorrect Authorization. CVSS score: 4.3/10. Published 2021-11-04.
How severe is CVE-2021-39902?: Medium severity. CVSS v3 base score is 4.3 out of 10.