What is the severity of CVE-2020-15084?

CVE-2020-15084 has a severity rating of Medium due to its potential for authorization bypass.

How do I fix CVE-2020-15084?

To fix CVE-2020-15084, update the express-jwt package to version 5.3.4 or later and ensure that algorithms are explicitly specified in the configuration.

What are the potential consequences of CVE-2020-15084?

The potential consequences of CVE-2020-15084 include unauthorized access to protected resources due to inadequate enforcement of specified algorithms.

Which versions of express-jwt are affected by CVE-2020-15084?

CVE-2020-15084 affects express-jwt versions up to and including 5.3.3.

Who is affected by CVE-2020-15084?

Any application using the affected versions of the express-jwt package without properly configuring the algorithms entry may be vulnerable.

Vulnerability/
CVE-2020-15084

critical

9.1

CWE

863 285

30/6/2020

4/8/2024

CVE-2020-15084: Authorization bypass in express-jwt

First published: Tue Jun 30 2020(Updated: )

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.

Credit: security-advisories@github.com

Affected Software	Affected Version	How to fix
Auth0 Express JWT	<=5.3.3

Remedy

https://github.com/auth0/express-jwt/commit/7ecab5f8f0cab5297c2b863596566eb0c019cdef

Never miss a vulnerability like this again

Reference Links

Frequently Asked Questions

What is the severity of CVE-2020-15084?
CVE-2020-15084 has a severity rating of Medium due to its potential for authorization bypass.
How do I fix CVE-2020-15084?
To fix CVE-2020-15084, update the express-jwt package to version 5.3.4 or later and ensure that algorithms are explicitly specified in the configuration.
What are the potential consequences of CVE-2020-15084?
The potential consequences of CVE-2020-15084 include unauthorized access to protected resources due to inadequate enforcement of specified algorithms.
Which versions of express-jwt are affected by CVE-2020-15084?
CVE-2020-15084 affects express-jwt versions up to and including 5.3.3.
Who is affected by CVE-2020-15084?
Any application using the affected versions of the express-jwt package without properly configuring the algorithms entry may be vulnerable.

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vendor/auth0
canonical/auth0 express jwt
version/auth0 express jwt/5.3.3

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