What’s Vulnerable › Vulnerabilities

CVE-2025-46572: passport-wsfed-saml2 Has SAML Authentication Bypass via Signature Wrapping

• Severity: critical (CVSS 9.3 v4.0)
• 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: 2025-05-06 · updated 2026-06-17
• Weakness: CWE-287

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.

Affected products

• auth0 passport-wsfed-saml2: from 3.0.5, < 4.6.4

References

• https://github.com/auth0/passport-wsfed-saml2/commit/e5cf3cc2a53748207f7a81bfba9195c8efa94181
• https://github.com/auth0/passport-wsfed-saml2/security/advisories/GHSA-wjmp-wphq-jvqf

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