OnePlus has sent an email to "some of" its customers advising them of a lapse in data protection at the company. In this case, it appears passwords and payment details are safe; however, personal information associated with these consumers may have been stolen. The OEM has asserted that it is investigating the issue and will be tightening their security in the future.
https://www.notebookcheck.net/OnePlus-reports-a-data-security-breach-that-affects-its-customers.444037.0.html