Open Source Matters Incorporated released Joomla security update version 3.4.5 on October twenty second two thousand fifteen. This update addresses three security flaws. Request data does not get filtered correctly there fore causing an SQL injection vulnerability.
There is a potential read access vulnerability caused by Access Control List checks. Finally, another potential read access vulnerability caused by faulty Access Control List checks. These security flaws are found in Joomla 3.0.0 to 3.4.5.
Joomla administrators are encouraged to upgrade to Joomla 3.4.5 to rectify these potential security holes. You can find out more information about this latest Joomla 3.4.5 update as well as download this version. This update only rectifies these security flaws and does not change any other aspects of Joomla.
You can download the full version of Joomla 3.4.5 or upgrade packages from afore mentioned Joomla page. Also, there is a Joomla 3.4.5 frequently asked questions page you can peruse. However, so far this page is empty, but perhaps in feature there will be pertinent information.
That download link also has full installation instructions as well as technical requirements. There is a set of instructions if you are just upgrading Joomla to 3.4.5.