# 3.1.17-rc2 ## Change Log ### Security * 2016-02-17 [37059eb](https://github.com/silverstripe/silverstripe-framework/commit/37059eb6b3546f304e9c031abca0f096ddb175c6) Hostname, IP and Protocol Spoofing through HTTP Headers (Ingo Schommer) - See [ss-2016-003](http://www.silverstripe.org/download/security-releases/ss-2016-003) * 2016-02-17 [5d2fc0d](https://github.com/silverstripe/silverstripe-framework/commit/5d2fc0d7cac4ce686f7ae05c1a7b1ad8c01711a8) Block unauthenticated access to dev/build/defaults (Damian Mooyman) - See [ss-2015-028](http://www.silverstripe.org/download/security-releases/ss-2015-028) * 2016-02-17 [013524a](https://github.com/silverstripe/silverstripe-framework/commit/013524af5069bb0cf909853f04418d9bef56d18c) Ensure Gridfield actions respect CSRF (Damian Mooyman) - See [ss-2016-002](http://www.silverstripe.org/download/security-releases/ss-2016-002)