Shareaholic < 9.7.6 - Information Disclosure

The Professional Social Sharing Buttons, Icons & Related Posts WordPress plugin before 9.7.6 does not have proper authorisation check in one of the AJAX action, available to unauthenticated (in v < 9.7.5) and author+ (in v9.7.5) users, allowing them to call it and retrieve various information such as the list of active plugins, various version like PHP, cURL, WP etc.