Taken from the Joomla! Developer website, this is a critical update to secure your Joomla Web hosting.
Inadequate filtering leads to the ability to bypass file type upload restrictions.
Joomla! version 2.5.13 and earlier 2.5.x versions; and version 3.1.4 and earlier 3.x versions.
Ensure that you have upgraded your Joomla install to version 2.5.14 or 3.1.5.
Tags : Joomla, Joomla Web Hosting, security update, web hosting