There’s a serious security issue with Joomla. If you’re using it please patch. “The Joomla security team have just released a new version of Joomla to patch a critical remote command execution vulnerability that affects all versions from 1.5 to 3.4. This is a serious vulnerability that can be easily exploited and is already in the wild. If you are using Joomla, you have to update it right now.” Attackers do appear to be active.