CVE-2025-46573: passport-wsfed-saml2 Has SAML Authentication Bypass via Attribute Smuggling
First published: Tue May 06 2025(Updated: )
### Overview This vulnerability 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. ### Am I Affected? You are affected by this SAML Attribute Smuggling vulnerability if you are using `passport-wsfed-saml2` version 4.6.3 or below, specifically under the following conditions: 1. The service provider is using `passport-wsfed-saml2`, 2. A valid SAML Response signed by the Identity Provider can be obtained ### Fix Upgrade to v4.6.4 or greater.
Credit: security-advisories@github.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| passport-wsfed-saml2 | >=3.0.5<=4.6.3 | |
| npm/passport-wsfed-saml2 | >=3.0.5<=4.6.3 | 4.6.4 |
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Reference Links
Frequently Asked Questions
What is the severity of CVE-2025-46573?
CVE-2025-46573 is a high severity vulnerability that allows an attacker to impersonate any user during SAML authentication.
How do I fix CVE-2025-46573?
To fix CVE-2025-46573, update the passport-wsfed-saml2 library to a version later than 4.6.3.
What versions of passport-wsfed-saml2 are affected by CVE-2025-46573?
CVE-2025-46573 affects passport-wsfed-saml2 versions from 3.0.5 up to and including 4.6.3.
What impact does CVE-2025-46573 have on applications using passport-wsfed-saml2?
CVE-2025-46573 allows attackers to exploit SAML responses, potentially leading to unauthorized access and impersonation of users.
Is there a workaround for CVE-2025-46573 if I cannot update immediately?
There is no specific workaround for CVE-2025-46573; the best course of action is to upgrade to a secure version.
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