My board was hacked

[The Keeper]

I think my board was hacked. They didn't destroy anything on the forum - but one of my members posted a snapshot of a private (moderator) forum.
One of my moderators asked where he got the pic from, and his best friend (who is I think is also a vb owner and knows a lot about computers and security) replied:

INSERT INTO moderator VALUES ('12', '231', '5', '0', '0', '1', '1', '1', '1', '1', '1', '0', '0', '0', '1', '0', '0', '1', '1');

EDIT: Though what does it matter? He has it etc...

Is it possible he's found a way to hack into the database?

I'm running 2.2.4