Directory traversal vulnerability in the iNetLanka Multiple root (com_multiroot) component 1.0 and 1.1 for Joomla! allows remote attackers to read arbitrary files via a .. (dot dot) in the controller parameter to index.php. NOTE: some of these details are obtained from third party information.
https://euvd.enisa.europa.eu/vulnerability/EUVD-2010-1973
http://www.vupen.com/english/advisories/2010/0928
http://www.securityfocus.com/bid/39552