Schedule Post Changes With PublishPress Future: Unpublish, Delete, Change Status, Trash, Change Categories <= 4.9.1 - Authenticated (Author+) Missing Authorization to Post/Page Status Modification

The Schedule Post Changes With PublishPress Future: Unpublish, Delete, Change Status, Trash, Change Categories plugin for WordPress is vulnerable to unauthorized modification of data due to a missing authorization check on the "saveFutureActionData" function in all versions up to, and including, 4.9.1. This makes it possible for authenticated attackers, with author level access and above, to change the status of arbitrary posts and pages via the REST API endpoint.