Multiple PHP remote file inclusion vulnerabilities in the NFN Address Book (com_nfn_addressbook) 0.4 component for Mambo and Joomla! allow remote attackers to execute arbitrary PHP code via a URL in the mosConfig_absolute_path parameter to (1) components/com_nfn_addressbook/nfnaddressbook.php or (2) administrator/components/com_nfn_addressbook/nfnaddressbook.php.