CVE-2024-21632 HIGH

CVE-2024-21632: omniauth-microsoft_graph vulnerable to account takeover (nOAuth)

Vendor Synth
Product omniauth-microsoft_graph
Weakness CWE-287 · Improper authentication
Published January 2, 2024
Last update June 17, 2025
View on NVD All CVEs

CVSS base score

8.6/10
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Confidentiality High
Integrity Low

CVSS vector

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

What the vulnerability does

01Description

omniauth-microsoft_graph provides an Omniauth strategy for the Microsoft Graph API. Prior to versions 2.0.0, the implementation did not validate the legitimacy of the `email` attribute of the user nor did it give/document an option to do so, making it susceptible to nOAuth misconfiguration in cases when the `email` is used as a trusted user identifier. This could lead to account takeover. Version 2.0.0 contains a fix for this issue.

Key dates

02Disclosure timeline

January 2, 2024 CVE published
June 17, 2025 Record updated