CVE-2022-23540

MEDIUM

Auth0 Jsonwebtoken < 8.5.1 - Authentication Bypass

Title source: rule
STIX 2.1

Description

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 if you do not specify algorithms in the `jwt.verify()` function. This issue has been fixed, please update to version 9.0.0 which removes the default support for the none algorithm in the `jwt.verify()` method. There will be no impact, if you update to version 9.0.0 and you don’t need to allow for the `none` algorithm. If you need 'none' algorithm, you have to explicitly specify that in `jwt.verify()` options.

Scores

CVSS v3 6.4
EPSS 0.0002
EPSS Percentile 5.7%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:H/A:L

CISA SSVC

Vulnrichment
Exploitation none
Automatable no
Technical Impact partial

Details

CWE
CWE-287 CWE-347
Status published
Products (2)
auth0/jsonwebtoken < 8.5.1
npm/jsonwebtoken 0 - 9.0.0npm
Published Dec 22, 2022
Tracked Since Feb 18, 2026