What is CVE-2017-0920?

CVE-2017-0920 is a medium-severity vulnerability in GitLab, classified under Authorization Bypass Through User-Controlled Key. CVSS score: 4.3/10. Published 2018-03-22.

How severe is CVE-2017-0920?

Medium severity. CVSS v3 base score is 4.3 out of 10.

Auth bypass in GitLab

CVE-2017-0920

GitLab Community and Enterprise Editions before 10.1.6, 10.2.6, and 10.3.4 are vulnerable to an authorization bypass issue in the Projects::MergeRequests::CreationsController component resulting in an attacker to see every project name and their respective namespace on a GitLab instance.

Vulnerability class: IDOR (Insecure Direct Object Reference)

Published 2018-03-22 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 4.3 (Medium). Vector: CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N.

EPSS exploit prediction

EPSS: 0.009 (57.8th percentile), scored 2026-10-01.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 58th percentile — 57.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.009 · newest: 0.009 · change: 0.000

Affected products

GitLab
GitLab Community And Enterprise Editions — versions Versions before 10.1.6, 10.2.6, and 10.3.4

Weakness classification (CWE)

References

hackerone.com/reports/301336 (Permissions Required)
www.debian.org/security/2018/dsa-4206 (vendor-advisory)
about.gitlab.com/2018/01/16/gitlab-10-dot-3-dot-4-released/ (Vendor Advisory)

Frequently asked questions

What is CVE-2017-0920?: CVE-2017-0920 is a medium-severity vulnerability in GitLab, classified under Authorization Bypass Through User-Controlled Key. CVSS score: 4.3/10. Published 2018-03-22.
How severe is CVE-2017-0920?: Medium severity. CVSS v3 base score is 4.3 out of 10.