PT-2025-48180 · Gitlab · Gitlab Ce/Ee

Published 2025-11-26 · Updated 2025-12-02 · CVE-2025-12653

Positive Technologies (AI Summary)

CVSS v3.1

6.5

Medium

Base vector

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

Name of the Vulnerable Software and Affected Versions GitLab CE/EE versions 18.3 through 18.4.4 GitLab CE/EE versions 18.5 through 18.5.2 GitLab CE/EE versions 18.6 through 18.6.0

Description A flaw exists in GitLab CE/EE that, under specific conditions, could allow an unauthenticated user to join arbitrary organizations by manipulating headers within HTTP requests.

Recommendations Update GitLab CE/EE to version 18.4.5 or later. Update GitLab CE/EE to version 18.5.3 or later. Update GitLab CE/EE to version 18.6.1 or later.

Exploit

Fix

Authentication Bypass by Spoofing

Weakness Enumeration

CWE-290

Related Identifiers

BDU:2025-16470

BIT-GITLAB-2025-12653

CVE-2025-12653

Affected Products

Gitlab Ce/Ee

References · 11

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/12xxx/CVE-2025-12653.json · Exploit
• 🔥 https://hackerone.com/reports/3370245 · Exploit
• https://bdu.fstec.ru/vul/2025-16470 · Security Note
• https://about.gitlab.com/releases/2025/11/26/patch-release-gitlab-18-6-1-released · Vendor Advisory
• https://osv.dev/vulnerability/BIT-gitlab-2025-12653 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2025-12653 · Security Note
• https://osv.dev/vulnerability/CVE-2025-12653 · Vendor Advisory
• https://t.me/CVEtracker/38318 · Telegram Post
• https://gitlab.com/gitlab-org/gitlab/-/issues/579372 · Note
• https://twitter.com/VulmonFeeds/status/1993816652048200030 · Twitter Post
• https://twitter.com/CVEnew/status/1993776321596678625 · Twitter Post