The Button Block – Get fully customizable & multi-functional buttons plugin for WordPress is vulnerable to Sensitive Information Exposure in all versions up to, and including, 1.1.5 via the 'btn_block_duplicate_post' function. This makes it possible for authenticated attackers, with Contributor-level access and above, to extract potentially sensitive data from draft, scheduled (future), private, and password protected posts.
https://plugins.trac.wordpress.org/changeset/3208482/button-block