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CVE-2024-21632 — Vulnerability in omniauth-microsoft_graph — CVE...

HIGH

Omniauth::MicrosoftGraph Account takeover (nOAuth)

Published January 3, 2024Updated September 10, 2026Source: osv

Summary

### Summary 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](https://www.descope.com/blog/post/noauth) misconfiguration in cases when the `email` is used as a trusted user identifier

Advisory Timeline

  • First published January 3, 2024 (1013 days ago).
  • Last revised September 10, 2026 — 980 days after initial publication.

Remediation

Upgrade to the fixed version using your package manager.

Bundler
Update omniauth-microsoft_graph to 2.0.0 or later
gem install omniauth-microsoft_graph -v 2.0.0

After upgrading, run your dependency scanner again to confirm the vulnerability is resolved.

Affected Packages (1)

Affects 1 ecosystem: rubygems (1).

PackageEcosystemAffectedFixed In
omniauth-microsoft_graph
rubygems
0.1.0, 0.1.1, 0.2.0, 0.2.1 (+7 more)2.0.0

Vulnerability Classification

Common Weakness Enumeration (CWE) identifiers for this vulnerability type.

  • CWE-287
    Improper AuthenticationMITRE

CVSS Score Breakdown

What the CVSS (Common Vulnerability Scoring System) 8.6 score means for each attack dimension.

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
Low
Availability
Low

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

References

Frequently Asked Questions

What is CVE-2024-21632?
Omniauth::MicrosoftGraph Account takeover (nOAuth) This vulnerability has been assigned a severity rating of HIGH (CVSS score: 8.6/10).
How do I check if my project is affected by CVE-2024-21632?
CVE-2024-21632 affects omniauth-microsoft_graph. Use GeekWala's free vulnerability scanner to check your dependencies against CVE-2024-21632 and 200,000+ other known vulnerabilities.

Severity & Exploitability

CVSS Score
8.6

High exploitability or significant impact. Prioritize remediation within days.

Also Known As

GHSA-5g66-628f-7cvj

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