Flatsome < 3.20.13 - Unauthenticated Unpublished Post Disclosure via flatsome_ajax_apply_shortcode
The Flatsome WordPress theme before 3.20.13 does not perform a capability or nonce check on an AJAX action available to unauthenticated users, and does not restrict the status of the posts it returns by ID, allowing unauthenticated users to disclose the content of unpublished (draft and pending) posts.