CVE-2025-12653 — MEDIUM (6.5)

Q: How severe is CVE-2025-12653?

CVE-2025-12653 has been rated MEDIUM with a CVSS base score of 6.5/10. Review the CVSS metrics above for detailed severity breakdown.

Q: Is there a patch for CVE-2025-12653?

Check the references section above for vendor advisories and patch information. Affected products include: Gitlab Gitlab.

Vulnerability 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.

CVSS Score

6.5

MEDIUM

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

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality

LOW

Integrity

LOW

Availability

NONE

Affected Products

Vendor	Product	Versions
Gitlab	Gitlab	>= 18.3.0, < 18.4.5

Related Weaknesses (CWE)

CWE-290

References

https://about.gitlab.com/releases/2025/11/26/patch-release-gitlab-18-6-1-release
https://gitlab.com/gitlab-org/gitlab/-/issues/579372Broken Link
https://hackerone.com/reports/3370245Permissions Required

FAQ

What is CVE-2025-12653?

CVE-2025-12653 is a vulnerability with a CVSS score of 6.5 (MEDIUM). 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 unauthent...

How severe is CVE-2025-12653?

CVE-2025-12653 has been rated MEDIUM with a CVSS base score of 6.5/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2025-12653?

Check the references section above for vendor advisories and patch information. Affected products include: Gitlab Gitlab.