How to get the latest security updates for CyanogenMod? I have installed CyanogenMod in February 2016, and the device information showed Android version "5.1.1", and the security patch level was "November 2015". 

This hasn't changed until today (2016-02-20): The device says that there are no updates.

Looking at http://www.cyanogenmod.org/blog the last entry with "Android Security Bulletin" in the title was back in October 2015.

Looking at https://source.android.com/security/bulletin/index.html there are security bulletins for each month.

So my question is: How can I get these Android security updates for CyanogenMod?

Any information about that delay (if it's really one) is appreciated as well.
It's OK if have to compile it myself.

In case it's device specific: I am using a Samsung Galaxy S4 mini.

Update

I have probably used the "Download latest release" link on the page pointed out by xangua in his answer, and it seems that this link in fact refers to a "snapshot". I am looking for security patches for the "latest release" (v12).
Sounds like you haven't updated in a long time as at today (2016-02-20) latest nighty for that device is cm13.0 2016-02-19. 

If you refer however to a snapshot, as you can see the latest available one is from November.

https://download.cyanogenmod.org/?device=serranoltexx