Vulnerabilities > CVE-2020-15084 - Incorrect Authorization vulnerability in Auth0 Express-Jwt

CVSS 9.1 - CRITICAL

Attack vector

NETWORK

Attack complexity

LOW

Privileges required

NONE

Confidentiality impact

HIGH

Integrity impact

HIGH

Availability impact

NONE

network

low complexity

auth0

CWE-863

critical

NVD

Published: 2020-06-30

Updated: 2022-10-21

Summary

In express-jwt (NPM package) up and including version 5.3.3, the algorithms entry to be specified in the configuration is not being enforced. When algorithms is not specified in the configuration, with the combination of jwks-rsa, it may lead to authorization bypass. You are affected by this vulnerability if all of the following conditions apply: - You are using express-jwt - You do not have **algorithms** configured in your express-jwt configuration. - You are using libraries such as jwks-rsa as the **secret**. You can fix this by specifying **algorithms** in the express-jwt configuration. See linked GHSA for example. This is also fixed in version 6.0.0.

Vulnerable Configurations

Part	Description	Count
Application	Auth0 Auth0 Express JWT 0.1.0 Auth0 Express JWT 0.1.1 Auth0 Express JWT 0.1.2 Auth0 Express JWT 0.1.3 Auth0 Express JWT 0.1.4 Auth0 Express JWT 0.2.0 Auth0 Express JWT 0.2.1 Auth0 Express JWT 0.2.2 Auth0 Express JWT 0.2.3 Auth0 Express JWT 0.3.0 Auth0 Express JWT 0.3.1 Auth0 Express JWT 0.3.2 Auth0 Express JWT 0.4.0 Auth0 Express JWT 0.5.0 Auth0 Express JWT 0.5.1 Auth0 Express JWT 0.6.0 Auth0 Express JWT 0.6.1 Auth0 Express JWT 0.6.2 Auth0 Express JWT 1.0.0 Auth0 Express JWT 1.1.0 Auth0 Express JWT 1.2.0 Auth0 Express JWT 1.3.0 Auth0 Express JWT 1.3.1 Auth0 Express JWT 1.4.0 Auth0 Express JWT 2.0.0 Auth0 Express JWT 2.0.1 Auth0 Express JWT 2.1.0 Auth0 Express JWT 3.0.0 Auth0 Express JWT 3.0.1 Auth0 Express JWT 3.1.0 Auth0 Express JWT 3.2.0 Auth0 Express JWT 3.3.0 Auth0 Express JWT 3.4.0 Auth0 Express JWT 4.0.0 Auth0 Express JWT 5.0.0 Auth0 Express JWT 5.1.0 Auth0 Express JWT 5.2.0 Auth0 Express JWT 5.3.0 Auth0 Express JWT 5.3.1 Auth0 Express JWT 5.3.2 Auth0 Express JWT 5.3.3	41

Common Weakness Enumeration (CWE)

CWE-863 - Incorrect Authorization

Summary

Vulnerable Configurations

Common Weakness Enumeration (CWE)

References