auth0 passport-wsfed-saml2 up to 4.6.3 SAML2 Authentication improper authentication

Summaryinfo

A vulnerability labeled as critical has been found in auth0 passport-wsfed-saml2 up to 4.6.3. This issue affects some unknown processing of the component SAML2 Authentication. The manipulation results in improper authentication. This vulnerability is cataloged as CVE-2025-46573. The attack may be launched remotely. There is no exploit available. The affected component should be upgraded.

Detailsinfo

A vulnerability classified as critical has been found in auth0 passport-wsfed-saml2 up to 4.6.3. Affected is an unknown part of the component SAML2 Authentication. The manipulation with an unknown input leads to a improper authentication vulnerability. CWE is classifying the issue as CWE-287. When an actor claims to have a given identity, the product does not prove or insufficiently proves that the claim is correct. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

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 tampering with a valid SAML response. This can be done by adding attributes to the response. Users are affected specifically when the service provider is using `passport-wsfed-saml2` and a valid SAML Response signed by the Identity Provider can be obtained. Version 4.6.4 contains a fix for the vulnerability.

The advisory is available at github.com. This vulnerability is traded as CVE-2025-46573 since 04/24/2025. The exploitability is told to be easy. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. The technical details are unknown and an exploit is not available.

Upgrading to version 4.6.4 eliminates this vulnerability. Applying the patch e5cf3cc2a53748207f7a81bfba9195c8efa94181 is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version.

If you want to get best quality of vulnerability data, you may have to visit VulDB.

Productinfo

Vendor

• auth0

Name

• passport-wsfed-saml2

Version

• 4.6.0
• 4.6.1
• 4.6.2
• 4.6.3

License

• open-source

Website

• Product: https://github.com/auth0/passport-wsfed-saml2/

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If you want to get best quality of vulnerability data, you may have to visit VulDB.

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