Thread:Project:Support desk/Fatal error: Call to a member function addWikiMsg() on a non-object in /home/username/public html/wiki/includes/specials/SpecialLinkSearch.php on line 82/reply (21)

There isn't a whole lot of danger then. Its still not exactly a great idea from a paranoia perspective, but probably not something to worry about if no one knows where your wiki is located.