CVE-2025-12653

medium

Description

GitLab has remediated an issue in GitLab CE/EE affecting all versions from 18.3 before 18.4.5, 18.5 before 18.5.3, and 18.6 before 18.6.1 that under specific conditions could have allowed an unauthenticated user to join arbitrary organizations by changing headers on some requests.

References

https://about.gitlab.com/releases/2025/11/26/patch-release-gitlab-18-6-1-released/

https://hackerone.com/reports/3370245

https://gitlab.com/gitlab-org/gitlab/-/issues/579372

https://euvd.enisa.europa.eu/vulnerability/EUVD-2025-199760

Details

Source: Mitre, NVD

Published: 2025-11-26

Updated: 2025-12-10

Named Vulnerability: GHSA-2v4g-65gf-w58f

Risk Information

CVSS v2

Base Score: 6.4

Vector: CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:N

Severity: Medium

CVSS v3

Base Score: 6.5

Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N

Severity: Medium

EPSS

EPSS: 0.00289