CVE-2015-9235: nodejs-jsonwebtoken: verification step bypass with an altered token

Severity: Critical

CVSS Score: 9.8

In jsonwebtoken node module before 4.2.2 it is possible for an attacker to bypass verification when a token digitally signed with an asymmetric key (RS/ES family) of algorithms but instead the attacker send a token digitally signed with a symmetric algorithm (HS* family).