Marriott International has today announced that it has suffered a data breach affecting up to 5.2 million people. The hotel chain says it uses an application to help provide services to its guests.
https://nakedsecurity.sophos.com/2020/03/31/marriott-international-confirms-data-breach-of-up-to-5-2-million-guests/
https://nakedsecurity.sophos.com/2020/03/31/marriott-international-confirms-data-breach-of-up-to-5-2-million-guests/