Foren / Cotonti / General / Security

With regards to the safety of other websites on your shared host, that should be mainly the concern of your host, not you. I'm not saying you shouldn't make sure your site is safe, but it isn't your responsibility if anything happens to other sites (unless such a thing is in your contract with them). Now that I think of it, the fact that you know of a security issue could have them argue that you're negligent. Anyway, just update your site and you'll be fine. You don't even have to migrate to Cotonti if you really don't want to, but at least update to a newer version of LDU or Seditio.