CVE-2021-41274 (solidus_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 solidus_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_session strategies (: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 it’s generated with Rails aren’t affected.

Users should promptly update to solidus_auth_devise version 2.5.4.

A couple of options:

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
```
We’ve also released new Solidus versions monkey patching solidus_auth_devise with the quick fix. Those versions are v3.1.3, v.3.0.3 & v2.11.12. See GHSA-5629-8855-gf4g for details.

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