BIT-gitlab-2025-12653

vendorUSosv

Authentication Bypass by Spoofing in GitLab

view advisory published 2025-12-02Licence: per source

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.

describes (1)

Related CVEs.

ID	severity	EPSS	exploitable	published
CVE-2025-12653US	—	0.31% (24th)	—	2025-11-26
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…

references

External citations — patches, advisories, analysis.

https://about.gitlab.com/releases/2025/11/26/patch-release-gitlab-18-6-1-released/WEB
https://gitlab.com/gitlab-org/gitlab/-/issues/579372WEB
https://hackerone.com/reports/3370245WEB
https://nvd.nist.gov/vuln/detail/CVE-2025-12653WEB

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