Is CVE-2024-21632 actively exploited?

No active exploitation of CVE-2024-21632 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2024-21632 be exploited remotely?

Yes. CVE-2024-21632 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2024-21632?

CVE-2024-21632 has a CVSS score of 9.8 (CRITICAL).

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CRITICAL

CVE-2024-21632

CWE-287Published: January 2, 2024· Updated: Jun 17, 2026

9.8

CVSS v3.1

Official Description

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.

NVD Source

Risk Analysis

The omniauth-microsoft_graph library fails to validate the email attribute, leading to a nOAuth misconfiguration. This can allow an attacker to perform account takeovers by spoofing user identifiers.

There is no known public exploit, and it is not in the CISA KEV. The vulnerability is remotely exploitable.

Recommended Action

Update omniauth-microsoft_graph to version 2.0.0 or later. Ensure that email identifiers are properly validated against trusted sources.

Generated by the CTIWATCH analysis pipeline from this CVE's metadata (CVSS, EPSS, KEV status, exploit intelligence). Verify against vendor advisories before acting.

Technical Analysis

CVE-2024-21632 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 9.8.

From a weakness classification perspective (CWE-287): Authentication bypass vulnerabilities allow attackers to access protected resources without valid credentials.