Security and privacy

Hi all While doing a search about our website http://cmcf.men.gov.ma/, I found this issue about our moodle database (Table structure for table mdl_user) : http://pastebin.com/sGRfzhFw Is it a vulnerability in our database? How can this happen? All the information of our users are there... Our Moodle : http://cmcf.men.gov.ma/online/ Moodle 2.1.7+ (Build: 20120719)