The RecentChanges feature in WikkaWiki (Wikka Wiki) before 1.1.6.3 allows remote attackers to obtain the names, and possibly revision notes and dates, of private pages via RSS feeds.
http://www.vupen.com/english/advisories/2007/1725
http://www.securityfocus.com/bid/23894
http://www.attrition.org/pipermail/vim/2007-May/001607.html
http://wush.net/trac/wikka/ticket/305
http://wikkawiki.org/WikkaReleaseNotes