The Migration, Backup, Staging WordPress plugin before 0.9.70 does not sanitise and escape the sub_page parameter before outputting it back in the page, leading to a reflected Cross-Site Scripting
The Migration, Backup, Staging WordPress plugin before 0.9.69 does not have authorisation when adding remote storages, and does not sanitise as well as escape a parameter from such unauthenticated requests before outputting it in admin page, leading to a Stored Cross-Site Scripting issue