SilverStripe 3.1.16 and 3.2.1 releases have now been published, and are available for download.
Users of 3.2.0 or below should upgrade at their earliest convenience.
This release contains some important and minor security issues, as well as a number of other bugfixes.
Details of these security fixes (ss-2015-021, ss-2015-022, ss-2015-025, ss-2015-026 and ss-2015-027) can be read on the security releases page.
The changelog, upgrading notes, and other important information is available on the release notes pages at:
To get setup, you can install this using composer (as below):
composer create-project silverstripe/installer path/to/project 3.2.1
You can also download pre-built zip / tar from http://www.silverstripe.org/software/download