Vulnerability · Published Sep 1, 2023 · Assigned by GitLab

CVE-2023-3915Incorrect Execution-Assigned Permissions in GitLab

Medium 6.5

In plain English

A medium-severity security flaw in GitLab from GitLab. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.7% (higher than 53% of all known vulnerabilities).

Severity (CVSS 3.1)6.5Medium

Exploit odds (30 days)0.7%top 47.4% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

Official description

An issue has been discovered in GitLab EE affecting all versions starting from 16.1 before 16.1.5, all versions starting from 16.2 before 16.2.5, all versions starting from 16.3 before 16.3.1. If an external user is given an owner role on any group, that external user may escalate their privileges on the instance by creating a service account in that group. This service account is not classified as external and may be used to access internal projects.

Affected products (as reported)

Vendor	Product	Versions
GitLab	GitLab	16.1 – before 16.1.516.2 – before 16.2.516.3 – before 16.3.1

Weakness: CWE-279 · Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:N

References

GitLab Issue #417664 issue-tracking, permissions-required
HackerOne Bug Bounty Report #2040834 technical-description, exploit, permissions-required