Can someone do this?

[nine.seven]

Umm.. I got this completely random voicemail this morning and I'm wondering if what he is saying is true?

http://img159.imageshack.us/my.php?i...icemaileg8.swf

Log:
Message received at 4 17 am
Hello hello David, Parker
My name would be, Hairy John
Ok
and I was just called to let you know
that i found a
fewwww
exploits in ur website
a little bit of SQL injection

dunno what he says here really
umm ill be doing a mb5 hash
that will be giving me your admin password

i would so kindly be taking that website over
in a couple hours
if u would like to go on and take a look
you have a great day


I haven't noticed anything wrong with my forums, and I don't remember installing anything weird. I am not professional at it or anything but I know my way around PHP and vbulletin (so I doubt I messed something up like that).

Only thing that has been different in a week or 2 ago I got some vbulletin errors (this was the email.. I got 8 in a row same minute.. All had a different image.. image is users avatars):

Database error in vBulletin :

mysql_connect() [<a href='function.mysql-connect'>function.mysql-connect</a>]: User [user] already has more than 'max_user_connections' active connections
/555/555/555/555/forums/includes/class_core.php on line 274

MySQL Error :
Error Number :
Date : Thursday, February 14th 2008 @ 08:07:29 AM
Script : http://555/forums/image.php?u=96&amp;dat...ine=1200931676
Referrer :
IP Address : 69.89.55.55
Username :
Classname : vb_database