Auth bypass in Gitlab

CVE-2021-39893

A potential DOS vulnerability was discovered in GitLab starting with version 9.1 that allowed parsing files without authorisation.

Vulnerability class: Broken Access Control

EPSS: 0.011 (62.0th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L.

Affected products

Gitlab — versions >=9.1, <14.1.7, >=14.2, <14.2.5, >=14.3, <14.3.1

Weakness classification (CWE)

CWE-862 — Missing Authorization

References

cve@gitlab.com (x_refsource_MISC, Broken Link)
cve@gitlab.com (x_refsource_CONFIRM, Vendor Advisory)

Frequently asked questions

What is CVE-2021-39893?: CVE-2021-39893 is a medium-severity vulnerability in Gitlab, classified under Missing Authorization. CVSS score: 5.3/10. Published 2021-10-05.
How severe is CVE-2021-39893?: Medium severity. CVSS v3 base score is 5.3 out of 10.