What’s Vulnerable › Vulnerabilities

CVE-2024-21381: Microsoft Azure Active Directory B2C Spoofing Vulnerability

• Severity: medium (CVSS 6.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.4% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2024-02-13 · updated 2026-08-10
• Weakness: CWE-352

Description

Microsoft Azure Active Directory B2C Spoofing Vulnerability

Affected products

• Microsoft Azure Active Directory: all versions
• Microsoft Entra: from 1.0.0 before publication — fixed in publication

How to fix

Upgrade to a fixed version: Microsoft Entra publication. Check the vendor advisory for mitigations.

References

• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2024-21381
• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2024-21381

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