User Shortcodes Plus <= 2.0.2 - Insecure Direct Object Reference to Authenticated (Contributor+) Sensitive Information Disclosure via user_meta Shortcode

The User Shortcodes Plus plugin for WordPress is vulnerable to Insecure Direct Object Reference in all versions up to, and including, 2.0.2 via the user_meta shortcode due to missing validation on a user controlled key. This makes it possible for authenticated attackers, with contributor-level access and above, to retrieve potentially sensitive user meta.