got hacket, how? security hole?

[Killersushi]

hello

after a few weeks never watching at my website i realised that the website has been hacked. there was a french side indexed! how did the one that without my password?
does someone know how to fix this problem?
i use the version 1.6.X

thanx
killersushi

[allergie]

I've been also hacked with a phpdig in test for which I forgot to put an .htaccess in /includes.

[Charter]

...routine check of this (http://www.phpdig.net/forumdisplay.php?forumid=25)...