The Joomla team has released an update to patch a serious vulnerability on 3.x. This vulnerability is an SQL injection (CVE-2015-7858) that allows for an attacker to take over a vulnerable site with ease. We predicted that the attacks would start in the wild very soon, due to the popularity of the Joela platform and how easy the exploitation was. We released a new free guide to help you identify and remove Jomla hacks. The vulnerability was fixed last week.”]
Source: https://blog.sucuri.net/2015/10/joomla-sql-injection-attacks-in-the-wild.html