Social Images Widget <= 2.1 - Missing Authorization to Unauthenticated Arbitrary Plugin Settings Deletion

The Social Images Widget plugin for WordPress is vulnerable to unauthorized modification of data due to a missing capability check on the 'options_update' function in all versions up to, and including, 2.1. This makes it possible for unauthenticated attackers to delete the plugin's settings via a forged request granted they can trick a site administrator into performing an action such as clicking on a link.