CVE-2021-41275 (spree_auth_devise): Authentication Bypass by CSRF Weakness

CVSS v3.x: 9.3 (Critical)

CSRF vulnerability that allows user account takeover.

All applications using any version of the frontend component of spree_auth_devise are affected if protect_from_forgery method is both:

Executed whether as:
- A before_action callback (the default)
- A prepend_before_action (option prepend: true given) before the :load_object hook in Spree::UserController (most likely order to find).
Configured to use :null_session` or:reset_sessionstrategies (:null_session is the default in case the no strategy is given, but rails --new generated skeleton use ``:exception`).

That means that applications that haven't been configured differently from what is generated with Rails aren't affected.

If possible, change your strategy to :exception:

class ApplicationController
  &lt; ActionController::Base
  protect_from_forgery with: :exception
end

Add the following to config/application.rb to at least run the :exception strategy on the affected controller:

config.after_initialize do
  Spree::UsersController.protect_from_forgery
  with: :exception
end

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