Directory traversal vulnerability in the SimpleDownload (com_simpledownload) component before 0.9.6 for Joomla! allows remote attackers to include and execute arbitrary local files via a .. (dot dot) in the controller parameter to index.php.
https://exchange.xforce.ibmcloud.com/vulnerabilities/58625
http://www.securityfocus.com/archive/1/511305/100/0/threaded
http://secunia.com/advisories/39871
http://extensions.joomla.org/extensions/directory-a-documentation/downloads/10717