How severe is CVE-2025-46573?

No CVSS score has been assigned to CVE-2025-46573 yet. Review the advisory details and affected package list to assess your exposure.

Which packages are affected by CVE-2025-46573?

CVE-2025-46573 affects the following packages: passport-wsfed-saml2 (npm). Ecosystems affected: npm.

How do I fix CVE-2025-46573?

Update passport-wsfed-saml2 to 4.6.4 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2025-46573 is resolved across your whole dependency graph.

How do I detect CVE-2025-46573 in my npm dependencies?

Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for passport-wsfed-saml2, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.

How do I mitigate CVE-2025-46573 if there is no patch (or I can't update yet)?

If you can't upgrade right away: gate or disable the affected feature, validate untrusted input at the boundary, and avoid passing attacker-controlled data into the vulnerable path. O3's runtime protection blocks exploitation in production as an interim safeguard until the upgrade lands.

How does O3 Security protect against CVE-2025-46573?

O3 Security's impact-aware SCA analyses which vulnerable code paths your application actually calls, so a match like CVE-2025-46573 can be triaged on real exposure rather than presence alone.

Is CVE-2025-46573 actively exploited in the wild?

No public exploit code has been indexed for CVE-2025-46573 yet. This does not mean the vulnerability cannot be exploited — absence of public exploits does not imply safety. Apply the recommended fix and use O3 Security to monitor your exposure.

What is the EPSS score for CVE-2025-46573?

CVE-2025-46573 has an EPSS (Exploit Prediction Scoring System) score of 0.4%, placing it in the 30th percentile of all CVEs. EPSS is maintained by FIRST.org and estimates the probability that a vulnerability will be exploited in the wild within the next 30 days. This score indicates relatively lower exploitation probability, though the CVSS severity should still guide your patching priority.

What type of vulnerability is CVE-2025-46573?

CVE-2025-46573 is classified as Improper Authentication (CWE-287). This weakness type describe the underlying flaw category, which helps determine the potential impact and the right class of mitigation.

When was CVE-2025-46573 published, and has it been updated?

CVE-2025-46573 was published on May 6, 2025 and was last updated on August 12, 2026. Advisory data evolves as severity scores, affected ranges, and exploit intelligence are revised — always check the latest version of the advisory before acting.

📦 npm

Not in CISA KEV

CVE-2025-46573 — passport-wsfed-saml2

Fix: auth0/passport-wsfed-saml2@e5cf3cc

CVE-2025-46573 is a Improper Authentication vulnerability in passport-wsfed-saml2. A fix is available for passport-wsfed-saml2 — see the affected versions and patch details below.

passport-wsfed-saml2 Has SAML Authentication Bypass via Attribute Smuggling

Also known asGHSA-8gqj-226h-gm8r

Published

May 6, 2025

Updated

Aug 12, 2026

Affected

1 pkg

Patched

1 / 1

Exploits

None indexed

Exploitation data as of Sep 22, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

Exploitation Status

No confirmed exploitation observed yet

CISA’s own triage has not observed active exploitation or public proof-of-concept code for this CVE as of its last assessment.

Exploitation and automatability from CISA’s SSVC triage for CVE-2025-46573.

EPSS Exploitation Probability

via FIRST.org ↗

0.4%probability of exploitation in next 30 days

Lower Risk0.00%

Lower risk than most CVEs30th percentile — riskier than 30% of all scored CVEsHighest risk

EPSS (Exploit Prediction Scoring System) is a daily probability model maintained by FIRST.org. It estimates the likelihood a CVE will be exploited in production environments within the next 30 days, derived from real-world threat intelligence signals.

Real-World Exposure

1 pkg affected

How broadly this vulnerability is actually deployed: weekly install volume shows current usage, and reverse-dependency count shows how many other packages break if it stays unpatched.

2other npm packages depend on this — each one inherits the vulnerability until it's patched upstream

passport-wsfed-saml2npm

3Kdownloads / week

Description

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:

The service provider is using passport-wsfed-saml2,
A valid SAML Response signed by the Identity Provider can be obtained

Fix

Upgrade to v4.6.4 or greater.

Affected Packages

1 total 1 fixed

Ecosystem	Package	Vulnerable range	Fix
📦npm	`passport-wsfed-saml2`	≥ 3.0.5&&< 4.6.4	4.6.4`npm install passport-wsfed-saml2@4.6.4`

Detection & mitigation playbook

Open-source dependency

Detect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for passport-wsfed-saml2, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.
Fix
Update passport-wsfed-saml2 to 4.6.4 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2025-46573 is resolved across your whole dependency graph.
Workarounds
If you can't upgrade right away: gate or disable the affected feature, validate untrusted input at the boundary, and avoid passing attacker-controlled data into the vulnerable path. O3's runtime protection blocks exploitation in production as an interim safeguard until the upgrade lands.
How O3 protects you
O3 Security's impact-aware SCA analyses which vulnerable code paths your application actually calls, so a match like CVE-2025-46573 can be triaged on real exposure rather than presence alone.

Tailored to CVE-2025-46573. Runtime protection reduces exposure until a permanent patch is applied and verified — it complements patching, it doesn't replace it.

Frequently Asked Questions

### 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.

O3 Security · Impact-Aware SCA

Is CVE-2025-46573 in your dependencies?

O3 Security finds CVE-2025-46573 across npm dependencies, including transitive ones, and its impact-aware SCA ranks findings by whether your code actually calls the vulnerable path.

Scan my dependencies How O3 SCA works