telepark.wiki 2.4.23 and earlier allows remote attackers to bypass authorization and (1) delete arbitrary pages via a modified pageID parameter to ajax/deletePage.php or (2) delete arbitrary comments via a modified pageID parameter to ajax/deleteComment.php.
https://exchange.xforce.ibmcloud.com/vulnerabilities/54329
http://www.exploit-db.com/exploits/9483
http://secunia.com/advisories/37391
http://blog.telepark.com/telepark-web-software/2009/11/09/telepark-wiki-security-fixes/