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jwt-simple@0.4.1 vulnerabilities

JWT(JSON Web Token) encode and decode module

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Direct Vulnerabilities

Known vulnerabilities in the jwt-simple package. This does not include vulnerabilities belonging to this package’s dependencies.

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Vulnerability Vulnerable Version
  • M
Signature Verification Bypass

jwt-simple is a JWT(JSON Web Token) encode and decode module.

Affected versions of this package are vulnerable to Signature Verification Bypass. If no algorithm is specified in the decode() function, the packages uses the algorithm in the JWT to decode tokens. This allows an attacker to create a HS256 (symmetric algorithm) JWT with the server's public key as secret, and the package will verify it as HS256 instead of RS256 (asymmetric algorithm).

How to fix Signature Verification Bypass?

Upgrade jwt-simple to version 0.5.3 or higher.

<0.5.3
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