Skip to main content

Improper Restriction of Security Token Assignment


Severity Medium
Score 6.3/10


jsonwebtoken is an implementation of JSON Web Tokens. Versions prior to 9.0.0 of `jsonwebtoken` library can be misconfigured so that passing a poorly implemented key retrieval function referring to the `secretOrPublicKey` argument from the readme link will result in incorrect verification of tokens. There is a possibility of using a different algorithm and key combination in verification, other than the one that was used to sign the tokens. Specifically, tokens signed with an asymmetric public key could be verified with a symmetric HS256 algorithm. This can lead to successful validation of forged tokens. If your application is supporting usage of both symmetric key and asymmetric key in "jwt.verify()" implementation with the same key retrieval function.

  • LOW
  • LOW
  • NONE
  • LOW
  • LOW
  • LOW

CWE-1259 - Improper Restriction of Security Token Assignment

The System-On-A-Chip (SoC) implements a Security Token mechanism to differentiate what actions are allowed or disallowed when a transaction originates from an entity. However, the Security Tokens are improperly protected.

Advisory Timeline

  • Published