CVE-2025-46572: auth0 passport-wsfed-saml2 Improper Authentication

Vulnerability summary

CVE-2025-46572 is a critical (CVSS 9.3) Improper Authentication vulnerability in auth0 passport-wsfed-saml2. EPSS estimates a 0.42% chance of exploitation in the next 30 days, higher than 35.2% of scored vulnerabilities.

Timeline

1. 06-05-2025
   PublishedVulnerability first disclosed.
2. 13-05-2025
   Last modifiedVulnerability information updated.

Description

passport-wsfed-saml2 provides passport strategy for both WS-fed and SAML2 protocol. A vulnerability present starting in version 3.0.5 up to and including version 4.6.3 allows an attacker to impersonate any user during SAML authentication by crafting a SAMLResponse. This can be done by using a valid SAML object that was signed by the configured IdP. Users are affected specifically when the service provider is using passport-wsfed-saml2 and a valid SAML document signed by the Identity Provider can be obtained. Version 4.6.4 contains a fix for the vulnerability.

• CWE-287Improper AuthenticationWhen an actor claims to have a given identity, the product does not prove or insufficiently proves that the claim is correct.