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CVE-2025-65945— auth0/node-jws improper HMAC signature verification vulnerability

Quick assessment

Affected
auth0 node-jws
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

node-jws是Auth0开源的一个JSON Web签名库。 node-jws 3.2.2及之前版本和4.0.0版本存在数据伪造问题漏洞，该漏洞源于HS256算法签名验证不当，可能导致签名验证绕过。

CVSS 7.5 · High EPSS 0.21% · P11

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2025-65945

Vulnerability Information
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Vulnerability Title
auth0/node-jws improper HMAC signature verification vulnerability
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
密码学签名的验证不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
node-jws 数据伪造问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
node-jws是Auth0开源的一个JSON Web签名库。 node-jws 3.2.2及之前版本和4.0.0版本存在数据伪造问题漏洞，该漏洞源于HS256算法签名验证不当，可能导致签名验证绕过。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
auth0 node-jws < 3.2.3 -

II. Public POCs for CVE-2025-65945

# POC Description Source Link Shenlong Link
1 PoC for CVE-2025-65945 (Improper Verification of Cryptographic Signature in node-jws) https://github.com/jedisct1/CVE-2025-65945-poc POC Details
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Qwen3.6-35B-A3B · 10336 chars
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III. Intelligence Information for CVE-2025-65945

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IV. Related Vulnerabilities

Same vendor: auth0
Same weakness: CWE-347

V. Comments for CVE-2025-65945

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