How secure is v3.8.3

[digif]

There are security patches for v3.8.7, but not for v3.8.3, does that mean that they are secure enough or, they are not important anymore because of newer versions?

Thanks,
digif.

--------------- Added [DATE]1343308156[/DATE] at [TIME]1343308156[/TIME] ---------------

I had problems with my hosting provider, telling me that it's causing server overloading, and today, they sent me this:

Database error in vBulletin :

mysql_connect() [function.mysql-connect]: User beneamat_upgrade already has more than 'max_user_connections' active connections
/home/beneamat/public_html/includes/class_core.php on line 311

MySQL Error :
Error Number :
Request Date : Thursday, July 26th 2012 @ 02:24:06 AM
Error Date : Thursday, July 26th 2012 @ 02:24:13 AM
Script : http://www.beneamata.com/misc.php?do=showrules
Referrer :
IP Address : 82.193.99.55
Username :
Classname : vB_Database
MySQL Version :

Someone can explain what happened?