Paytium: Mollie payment forms & donations <= 4.3.7 - Missing Authorization in 'update_profile_preference'

The Paytium: Mollie payment forms & donations plugin for WordPress is vulnerable to unauthorized data modification due to a missing capability check on the update_profile_preference function in versions up to, and including, 4.3.7. This makes it possible for authenticated attackers with subscriber-level access to change plugin settings.