TI-2024-14357 Aliases CVE-2024-21632 GHSA-5g66-628f-7cvj

omniauth-microsoft_graph vulnerable to account takeover (nOAuth)

MEDIUM 45CWE-287Published 2024-01-02 · Updated 2025-06-17

Key facts

Attack vector: Network
Privileges required: None
User interaction: None
Attack complexity: Low
Impact type: Security bypass
Confidentiality · integrity · availability: High · High · High
Fix status: Fixed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA and GitHub. Impact type from CWE-287.

Summary

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.00904 60th percentileScored 2026-11-07

Public exploit Yes 1 exploit referenceTagged by NVD

Fix Fixed omniauth-microsoft_graph (synth): 2.0.0omniauth-microsoft_graph (RubyGems): 2.0.0

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
Automatable: No
Technical impact: Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
synth	omniauth-microsoft_graph	before 2.0.0	2.0.0	Patch available	CNA
—	omniauth-microsoft_graph (RubyGems)	before 2.0.0	2.0.0	Patch available	GHSA-5g66-628f-7cvj

omniauth-microsoft_graph Vendorsynth Affected before 2.0.0 Fixed in 2.0.0 Patch available CNA
omniauth-microsoft_graph (RubyGems) Vendor— Affected before 2.0.0 Fixed in 2.0.0 Patch available GHSA-5g66-628f-7cvj

CPE configurations NVD · 1

CPE	Versions	Role	Vendor
cpe:2.3:a:recognizeapp:omniauth\:\:microsoftgraph::::::ruby::*	microsoftgraph	Vulnerable	Recognizeapp

cpe:2.3:a:recognizeapp:omniauth\:\:microsoftgraph:*:*:*:*:*:ruby:*:* Versions microsoftgraph Vulnerable ·Recognizeapp

Remediation

Fix · CNA omniauth-microsoft_graph (synth) Fixed in 2.0.0
Fix · GHSA-5g66-628f-7cvj omniauth-microsoft_graph (RubyGems) Fixed in 2.0.0 Advisory →

Timeline

2026-10-02 Threatist record created from CVE-2024-21632
2026-10-03 Alias added: GHSA-5g66-628f-7cvj

References

Exploit 1

https://www.descope.com/blog/post/noauth

Patch 1

https://github.com/synth/omniauth-microsoft_graph/commit/f132078389612b797c872b45bd0e0b47382414c1

Advisory 2

Other 2

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences