Directory traversal vulnerability in the map feature (tiki-map.phtml) in Tiki CMS/Groupware (TikiWiki) 1.8.1 and earlier allows remote attackers to determine the existence of arbitrary files via .. (dot dot) sequences in the mapfile parameter.
https://exchange.xforce.ibmcloud.com/vulnerabilities/15848
http://tikiwiki.org/tiki-read_article.php?articleId=66