Improper Signature Verification in Node.js JSON Web Signature Implementation by Auth0
CVE-2025-65945

7.5HIGH

Key Information:

Vendor

Auth0

Status
Node-jws
Vendor
CVE Published:
4 December 2025

What is CVE-2025-65945?

The node-jws library by Auth0 suffers from an improper signature verification flaw, particularly when employing the HS256 algorithm under certain conditions. This vulnerability arises in applications that utilize the jws.createVerify() function for HMAC algorithms while allowing user-provided data in the JSON Web Signature's protected header or payload for HMAC secret lookups. This can potentially enable attackers to bypass the intended signature verification, compromising the integrity of the signed data. Essential patches have been released in versions 3.2.3 and 4.0.1 to address the issue.

Affected Version(s)

node-jws < 3.2.3 < 3.2.3

node-jws >= 4.0.0, <= 4.0.1 <= 4.0.0, 4.0.1

References

https://github.com/auth0/node-jws/security/advisories/GHS...
x_refsource_CONFIRM
https://github.com/auth0/node-jws/commit/34c45b2c04434f92...
x_refsource_MISC

CVSS V3.1

Score:
7.5
Severity:
HIGH
Confidentiality:
None
Integrity:
High
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

JSON
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CVE-2025-65945 : Improper Signature Verification in Node.js JSON Web Signature Implementation by Auth0