Monthly Quick Tips - November

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Hey folks! Back with another installment of monthly quick tips on trending search terms in the community. Here are a handful from the past month:

internal edge error

  • This error was related to an incident which has since been resolved. For more information including an RCA, please see Auth0’s status page.

jwt azp

  • The azp (Authorized Party) claim in a JSON Web Token (JWT) is an optional claim that is part of the standard set of claims in a JWT. It’s included to specify which party the token was issued for. This helps in preventing certain types of attacks where a token intended for one application might be mistakenly or maliciously used in a different application.

  • In summary, the azp claim in a JWT adds an extra layer of security by explicitly stating the authorized party for which the token is intended, thereby mitigating the risks associated with token misuse in multi-audience or multi-client environments.

has been blocked by cors policy: response to preflight request doesn't pass access control check: it does not have http ok status.

  • ​​Double-check that the “Allowed Web Origins” and “Allowed Origins (CORS)” fields in your Auth0 settings include the domain from which the request originates.

  • If you are running your application locally, ensure that the local host and port are also added to the Auth0 CORS settings.

proof key for code exchange is required for cross-origin authorization code redemption.

  • This error suggests that your application is expected to implement the PKCE (Proof Key for Code Exchange) flow for added security. This is particularly important for OAuth/OIDC applications that run on a user’s device and don’t have a backend to keep secrets safe.

  • PKCE adds an additional layer of security by generating a unique, temporary code (the “code verifier”) on the client side at the beginning of the authentication process. This code is then transformed into a “code challenge,” which is sent alongside the authorization request. When exchanging the authorization code for an access token, the original “code verifier” must also be sent to prove that the client making the request is the same one that initiated the authorization code request.

failed to fetch. possible reasons: cors network failure url scheme must be "http" or "https" for cors request.

  • Check your browser’s console logs and network tab for more details on the failed request.

  • Make sure CORS is configured correctly on the Auth0 dashboard and in your server settings.

  • Verify the URL scheme to make sure it’s either HTTP or HTTPS.

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