Re: Joomla J! Reactions Component Remote File include Bug

[software@xxxxxxxxxxx]

The entire langset.php file should be changed to:

<?php defined( '_VALID_MOS' ) or die( 'Direct access is prohibited.' );
global $mosConfig_lang;
if (file_exists("$comPath/custom/".$mosConfig_lang.".php")) {
   include("$comPath/custom/".$mosConfig_lang.".php");
} else {
   require("$comPath/custom/english.php");
} ?>

The spam expolit occurs because the original file does not test VALID_MOS. This 
vulnerability exists in build 1.8.1 and earlier.