Securing a form with an anti-forgery token

In this recipe, we explore an essential aspect of web security — protecting your application from CSRF attacks. CSRF attacks exploit the trust between our app and a user’s browser, making the browser perform unwanted actions using the user’s identity. An anti-forgery token, also known as a CSRF token, is a crucial security measure you must use to ensure that the requests sent to a server are genuine and originated from a legitimate user, not an attacker. Embedding an anti-forgery token in your forms practically creates a unique key sent with each post request. The server checks this token upon receiving a request; if the token is not present or is incorrect, the request is rejected, thus preventing unauthorized actions.

Let’s secure our event creation form with the anti-forgery token implementation offered in Blazor.

Getting ready

Before we explore securing a form with the anti-forgery token, do the following...