Cleartext Storage of Sensitive Information Affecting statamic/cms package, versions >=5.3.0, <5.6.2

Affected versions of this package are vulnerable to Cleartext Storage of Sensitive Information due to the user:register_form tag. An attacker can access password confirmation data stored in plain text by gaining access to user yaml files.

Notes:

This only affects sites matching all of the following conditions:

1. Running Statamic versions between 5.3.0 and 5.6.1. (This version range represents only one calendar week)

2. Using the user:register_form tag.

3. Using file-based user accounts. (Does not affect users stored in a database.)

4. Has users that have registered during that time period. (Existing users are not affected.)

Any users registered during that time period and using the affected version range will still have the the password_confirmation value in their yaml files.

It is recommended that affected users have their password reset. The following query can be entered into php artisan tinker and will output a list of affected emails:

Statamic\Facades\User::query()->whereNotNull('password_confirmation')->get()->map->email

The following can be entered into tinker and will clear both password_confirmation as well as their existing password. They will be required to reset their password before their next login attempt.

Statamic\Facades\User::query()
  ->whereNotNull('password_confirmation')->get()
  ->each(fn ($user) => $user->remove('password_confirmation')->passwordHash(null)->save());

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