CVE-2025-12653 — Authentication Bypass by Spoofing in Gitlab

CWE-290 — Authentication Bypass by SpoofingCWE-787 — Out-of-bounds Write5 documents5 sources
Severity
6.5MEDIUMNVD
EPSS
0.1%
top 77.77%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
6
GitlabDebian GitlabGitlab CE+3 more
Timeline
PublishedNov 26

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 vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:NExploitability: 3.9 | Impact: 2.5

Affected Packages8 packages

▶CVEListV5gitlab/gitlab18.3 — 18.4.5+2
▶NVDgitlab/gitlab18.3.0 — 18.4.5+2
▶debiandebian/gitlab
▶gitlabgitlab/gitlab

🔴Vulnerability Details

1
GHSA
GHSA-2v4g-65gf-w58f: GitLab has remediated an issue in GitLab CE/EE affecting all versions from 18↗2025-11-26
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📋Vendor Advisories

3
GitLab
CVE-2025-12653: 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 s↗2025-11-26
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Debian
CVE-2025-12653: gitlab - GitLab has remediated an issue in GitLab CE/EE affecting all versions from 18.3 ...↗2025
▶
Microsoft
An issue was found in Linux kernel before 5.5.4. The mwifiex_cmd_append_vsie_tlv() function in drivers/net/wireless/marvell/mwifiex/scan.c allows local users to gain privileges or cause a denial of se↗2020-05-12
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