What is CVE-2019-15733?

CVE-2019-15733 is a medium-severity vulnerability in GitLab, classified under Information Disclosure. CVSS score: 4.3/10. Published 2019-09-16.

How severe is CVE-2019-15733?

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

Information disclosure in GitLab

CVE-2019-15733

An issue was discovered in GitLab Community and Enterprise Edition 7.12 through 12.2.1. The specified default branch name could be exposed to unauthorized users.

Vulnerability class: Information Disclosure

Published 2019-09-16 · last modified 2026-06-17.

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:L/I:N/A:N.

EPSS exploit prediction

EPSS: 0.010 (62.9th percentile), scored 2026-10-07.

Low probability of exploitation in the next 30 days, but still tracked. 63rd percentile — 62.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.010 · newest: 0.010 · change: 0.000

Affected products

GitLab

Weakness classification (CWE)

CWE-200 — Information Disclosure

References

gitlab.com/gitlab-org/gitlab-ce/issues/61210 (Broken Link)
about.gitlab.com/2019/08/29/security-release-gitlab-12-dot-2-dot-3-released/ (Release Notes, Vendor Advisory)

Frequently asked questions

What is CVE-2019-15733?: CVE-2019-15733 is a medium-severity vulnerability in GitLab, classified under Information Disclosure. CVSS score: 4.3/10. Published 2019-09-16.
How severe is CVE-2019-15733?: Medium severity. CVSS v3 base score is 4.3 out of 10.