We have just released a bug fix update for the latest version of all IntelliJ-based IDEs (2016.1.x).
In addition to the usual functionality fixes, this update contains important fixes for two security issues inside IntelliJ Platform.
The vulnerabilities, in various forms, are also present in older versions of the IDEs; therefore, patches for those are also available.
While we have had no reports of any active attacks against these vulnerabilities, we strongly recommend all users to install the update as soon as possible.
Please read more on the issues and ways to update in this special blog post.