How to find users in the database with default passwords

select d.username,account_status
from dba_users_with_defpwd d inner join dba_users u
on d.username = u.username
where u.account_status = 'OPEN';
exit

Output in my case:

USERNAME                                 ACCOUNT_STATUS
---------------------------------------- --------------------
CTXSYS                                   OPEN
MGDSYS                                   OPEN

These accounts should have their password changed for security reasons.