MySQL Database Server open
MySQL Database Server open for another outside sites, not only for Localhost
There is no root account for MySQL on Plesk server. admin account is used instead of root. And this account can be used only from localhost. If you create user’s mysql accounts in Plesk, you can define their accessibility as it is required by hosting necessities. So, it is correct behaviour.
We have to close this item as Irrelevant, because it does not contain any actual feature request or useful information.