If you host multiple sites inside the same account and one of them is hacked, it is quite possible that all of them will be hacked after that. There are several reasons why this could happen, the two most popular are: using very weak passwords or using out-of-date scripts with known weaknesses. That way, a single compromised Internet site will do lots of damage to all your websites, since getting access to one script often allows hackers to access the hosting account. This is the reason why we've created a new security option known as JailHost. Once enabled, this feature will literally lock a site in its folder, so if an attacker takes over it, all the other sites in the account will be hidden. Thus they'll be resistant to further intrusion. The JailHost option doesn't suggest that you should not keep your websites updated, but it will significantly limit the damage.