Directory traversal vulnerability in the obSuggest (com_obsuggest) component before 1.8 for Joomla! allows remote attackers to read arbitrary files via a .. (dot dot) in the controller parameter to index.php.
https://euvd.enisa.europa.eu/vulnerability/EUVD-2011-4722
http://www.securityfocus.com/bid/48944
http://secunia.com/advisories/46844
http://foobla.com/news/latest/obsuggest-1.8-security-release.html