CE21 Suite <= 2.2.0 - Missing Authorization to Unauthenticated Plugin Settings Change

The CE21 Suite plugin for WordPress is vulnerable to unauthorized modification of data due to a missing capability check on the 'ce21_single_sign_on_save_api_settings' function in versions up to, and including, 2.2.0. This makes it possible for unauthenticated attackers to change plugin settings.