Vulnerability in Auth0 Node-Jws
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.
EPSS: 0.002 (10.7th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N.
Affected products
- Auth0 Node-jws — versions 4.0.0, < 3.2.3, >= 4.0.0, <= 4.0.1
Weakness classification (CWE)
Public proof-of-concept exploits
References
- security-advisories@github.com (x_refsource_CONFIRM, Vendor Advisory)
- security-advisories@github.com (Patch, x_refsource_MISC)
Frequently asked questions
- What is CVE-2025-65945?
- CVE-2025-65945 is a high-severity vulnerability in Auth0 Node-Jws, classified under Improper Verification of Cryptographic Signature. CVSS score: 7.5/10. Published 2025-12-04.
- How severe is CVE-2025-65945?
- High severity. CVSS v3 base score is 7.5 out of 10.
- Is CVE-2025-65945 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.