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CVE-2025-0549: Authentication Bypass Using an Alternate Path or Channel in GitLab

6.8 CVSS

Description

An issue has been discovered in GitLab CE/EE affecting all versions starting from 17.3 prior to 17.9.8, from 17.10 prior to 17.10.6, and from 17.11 prior to 17.11.2. A security vulnerability allows attackers to bypass Device OAuth flow protections, enabling authorization form submission through minimal user interaction.

Classification

CVE ID: CVE-2025-0549

CVSS Base Severity: MEDIUM

CVSS Base Score: 6.8

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

Problem Types

CWE-288: Authentication Bypass Using an Alternate Path or Channel

Affected Products

Vendor: GitLab

Product: GitLab

Exploit Prediction Scoring System (EPSS)

EPSS Score: 0.01% (probability of being exploited)

EPSS Percentile: 1.01% (scored less or equal to compared to others)

EPSS Date: 2025-06-07 (when was this score calculated)

References

https://nvd.nist.gov/vuln/detail/CVE-2025-0549
https://gitlab.com/gitlab-org/gitlab/-/issues/513996
https://hackerone.com/reports/2927555

Timeline