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CVE-2024-21632

27
FAUCET Score

CVE-2024-21632 affects omniauth-microsoft_graph versions prior to 2.0.0, stemming from insufficient validation of the 'email' attribute, which could lead to nOAuth misconfiguration and account takeover if 'email' is used as a trusted identifier. This critical vulnerability (CVSS 9.8) is easily exploitable over the network with no user interaction, allowing for full compromise of confidentiality, integrity, and availability. While no active exploitation or public exploit code has been identified, and community discussion is minimal, the high FAUCET Risk Score of 78/100 indicates significant potential impact.

Impacted Technologies

VendorProductVersion(s)CPE
< 2.0.0CPE matchmatch criteria
cpe:2.3:a:recognizeapp:omniauth\:\:microsoftgraph:*:*:*:*:*:ruby:*:*

CVSS Data

CVSS version used by this source: 3.1

8.6HIGH

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
LOW
Availability Impact
LOW
Exploitability Score
3.9
Impact Score
4.7
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.90%
Probability of exploitation in next 30 days
EPSS Percentile
56.1%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0090 is in the 41st percentile among its peer group of 36,862 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (2)

github_advisorypatch availablevia nvd_reference
View patch
rubygemspatch availablevia ghsa
Product: omniauth-microsoft_graphFixed in: 2.0.0

Vendor Advisories (1)

rubygemsGHSA-5g66-628f-7cvjhigh

Omniauth::MicrosoftGraph Account takeover (nOAuth)

Jan 3, 2024

References

github.com / synth/omniauth-microsoft_graph/commit/f132078389612b797c872b45bd0e0b47382414c1
Patch
github.com / synth/omniauth-microsoft_graph/security/advisories/GHSA-5g66-628f-7cvj
Vendor Advisory
descope.com / blog/post/noauth
Exploit