FluentBoards < 1.95.3 - Subscriber+ Cross-Board Task Disclosure via IDOR

The FluentBoards WordPress plugin before 1.95.3 does not verify that the items selected for a board import operation belong to a board the requesting user is authorized to access, allowing any authenticated user with member access to a single board to copy and read the stages and tasks (including titles, descriptions and file attachments) of any other board on the site.