Like it or not, CyanogenMod is a crazy-popular ROM, and it continues to be one of the most widely supported. The latest CyanogenMod snapshot build started rolling out late last night, and should be ready for most devices now. Grab the update from your update menu or from the CM download site.
CyanogenMod's Snapshot, or M build, is the main version of the ROM for users. It replaced the stable version a while back, but there are still nightly builds. The Snapshots are what you want to install to minimize the bugs you encounter.
We're still on KitKat here, as work on the Lollipop build is just starting. The download is only a few hundred megabytes, so get to it.
Update: The CM team has posted some info about what is included in this update. It's mostly bug fixes and security tweaks, like the POODLE SSLv3 issue. There's also better support for dual SIMs.