There is a possible open redirect when using the redirect_to helper with untrusted user input. 

  Vulnerable code will look like this:
  ```
  redirect_to(params[:some_param])
  ```

Rails 7.0 introduced protection against open redirects from calling redirect_to with untrusted user input. In prior versions the developer was fully responsible for only providing trusted input. However the check introduced could be bypassed by a carefully crafted URL.