CVE-2025-65945: node-jws Signature Bypass — Fix

Description

auth0/node-jws is a JSON Web Signature implementation for Node.js. In versions 3.2.2 and earlier and version 4.0.0, auth0/node-jws has an improper signature verification vulnerability when using the HS256 algorithm under specific conditions. Applications are affected when they use the jws.createVerify() function for HMAC algorithms and use user-provided data from the JSON Web Signature protected header or payload in HMAC secret lookup routines, which can allow attackers to bypass signature verification. This issue has been patched in versions 3.2.3 and 4.0.1.

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CVSS v3.1 Score

7.5

HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

Weakness Type (CWE)

CWE-347 CWE-347

Affected Products

Vendor	Product	Versions
auth0	node-jws	< 3.2.2
auth0	node-jws	All

References

Advisories & Patches

https://github.com/auth0/node-jws/commit/34c45b2c04434f925b638de6a061de9339c0ea2e https://github.com/auth0/node-jws/security/advisories/GHSA-869p-cjfg-cm3x

Frequently Asked Questions

What is CVE-2025-65945? +

auth0/node-jws is a JSON Web Signature implementation for Node.js. In versions 3.2.2 and earlier and version 4.0.0, auth0/node-jws has an improper signature verification vulnerability when using the HS256 algorithm under specific conditions. Applications are affected when they use the jws.createVerify() function for HMAC algorithms and use user-provided data from the JSON Web Signature protected header or payload in HMAC secret lookup routines, which can allow attackers to bypass signature verification. This issue has been patched in versions 3.2.3 and 4.0.1. It has a CVSS v3.1 base score of 7.5 (HIGH).

How severe is CVE-2025-65945? +

CVE-2025-65945 has a CVSS v3.1 score of 7.5 out of 10, rated HIGH. This is a high-severity vulnerability that should be prioritized for patching.

What products are affected by CVE-2025-65945? +

CVE-2025-65945 affects products from auth0, specifically: node-jws. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2025-65945? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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