---
title: "CVE-2025-46572: Passport-wsfed-saml2 allows SAML Authentication Bypass via Signature Wrapping"
url: https://erroneo.us/security/cve/CVE-2025-46572/
description: "CVE-2025-46572 (passport-wsfed-saml2 (npm)): passport-wsfed-saml2 provides passport strategy for both WS-fed and SAML2 protocol. A vulnerability present…"
type: vulnerability-record
section: "Security Digest"
date_published: 2025-05-06
date_modified: 2025-05-13
publisher: erroneo.us
author: erroneo.us Security Desk
cve: "CVE-2025-46572"
kev: false
cvss: 9.3
epss: 0.00423
license: All rights reserved. Quote with attribution and a link.
---

# CVE-2025-46572: Passport-wsfed-saml2 allows SAML Authentication Bypass via Signature Wrapping

**Signal:** Critical and remotely reachable. No known exploitation yet, but it is network-reachable without credentials. (Computed from CISA KEV, EPSS and CVSS; not an editorial verdict.)

## Should you act?

- No confirmed exploitation. It is not in CISA’s KEV catalog and CISA’s SSVC assessment records no known exploitation. That can change quickly after a public write-up; re-check if you are affected.
- EPSS 0.4% , percentile 35: FIRST’s model estimates a 0.4% chance of exploitation activity in the next 30 days, higher than 35% of all scored CVEs (low). EPSS is a probability, not a verdict.
- Remotely reachable with no login and no user interaction. If the vulnerable service is exposed to the internet, prioritize it.
- Only applies if your dependency tree includes passport-wsfed-saml2 (npm) >= 3.0.5, <= 4.6.3, fixed in 4.6.4 . Check your lockfile, including transitive dependencies.

## What it is

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 packages

- npm `passport-wsfed-saml2` >= 3.0.5, <= 4.6.3 → fixed: 4.6.4

## Affected products (CVE record)

- auth0 passport-wsfed-saml2: >= 3.0.5, < 4.6.4

## Severity

- GitHub_M CVSS 4.0: 9.3 `CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N`
- GitHub CVSS 4.0: 9.3 `CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N`

## Exploitation

- CISA KEV: not listed (no confirmed in-the-wild exploitation known to CISA).
- CISA SSVC assessment: exploitation none , automatable no , technical impact partial .
- FIRST EPSS (model of 2026-10-21): 0.42% probability of exploitation activity in the next 30 days; percentile 35.

## Sources

- [GitHub Advisory GHSA-wjmp-wphq-jvqf](https://github.com/advisories/GHSA-wjmp-wphq-jvqf)
- [CVE.org record CVE-2025-46572](https://www.cve.org/CVERecord?id=CVE-2025-46572)
- [NVD entry CVE-2025-46572](https://nvd.nist.gov/vuln/detail/CVE-2025-46572)
- [github.com](https://github.com/auth0/passport-wsfed-saml2/security/advisories/GHSA-wjmp-wphq-jvqf)
- [github.com](https://github.com/auth0/passport-wsfed-saml2/commit/e5cf3cc2a53748207f7a81bfba9195c8efa94181)

---
Source page: https://erroneo.us/security/cve/CVE-2025-46572/ · Security Digest: https://erroneo.us/security/ · More: https://erroneo.us/llms.txt