What is CVE-2022-23540?

CVE-2022-23540 is a medium-severity vulnerability in Auth0 Node-jsonwebtoken, classified under Improper Authentication. CVSS score: 6.4/10. Published 2022-12-22.

How severe is CVE-2022-23540?

Medium severity. CVSS v3 base score is 6.4 out of 10.

Is CVE-2022-23540 known to be exploited?

8 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Auth bypass in Auth0 Node-jsonwebtoken

CVE-2022-23540

In versions `<=8.5.1` of `jsonwebtoken` library, lack of algorithm definition in the `jwt.verify()` function can lead to signature validation bypass due to defaulting to the `none` algorithm for signature verification. Users are affected i…

Vulnerability class: Broken Authentication

EPSS: 0.000 (6.9th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 6.4 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:H/A:L.

Affected products

Auth0 Node-jsonwebtoken — versions <= 8.5.1

Weakness classification (CWE)

CWE-287 — Improper Authentication

Public proof-of-concept exploits

References

https://github.com/auth0/node-jsonwebtoken/security/advisories/GHSA-qwph-4952-7xr6 (x_refsource_CONFIRM)
https://github.com/auth0/node-jsonwebtoken/commit/e1fa9dcc12054a8681db4e6373da1b30cf7016e3 (x_refsource_MISC)
security.netapp.com/advisory/ntap-20240621-0007/

Frequently asked questions

What is CVE-2022-23540?: CVE-2022-23540 is a medium-severity vulnerability in Auth0 Node-jsonwebtoken, classified under Improper Authentication. CVSS score: 6.4/10. Published 2022-12-22.
How severe is CVE-2022-23540?: Medium severity. CVSS v3 base score is 6.4 out of 10.
Is CVE-2022-23540 known to be exploited?: 8 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.