SAML Authentication Vulnerability in Auth0's Passport Strategy for WS-fed and SAML2
CVE-2025-46572

9.3CRITICAL

Key Information:

Vendor

Auth0

Status
Passport-wsfed-saml2
Vendor
CVE Published:
6 May 2025

What is CVE-2025-46572?

A vulnerability in Auth0's passport-wsfed-saml2 strategy allows attackers to impersonate any user in the Auth0 tenant during SAML authentication. This occurs when a malformed SAMLResponse is crafted, leveraging a legitimate SAML object signed by the configured Identity Provider (IdP). The issue affects users relying on passport-wsfed-saml2 when a valid signed SAML document is compromised. It is crucial to update to version 4.6.4 or later to mitigate this risk.

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Affected Version(s)

passport-wsfed-saml2 >= 3.0.5, < 4.6.4

References

https://github.com/auth0/passport-wsfed-saml2/security/ad...
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https://github.com/auth0/passport-wsfed-saml2/commit/e5cf...
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CVSS V4

Score:
9.3
Severity:
CRITICAL
Confidentiality:
High
Integrity:
High
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • Vulnerability published

  • Vulnerability Reserved

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