https://arstechnica.com/gadgets/2017/12/macos-high-sierra-10-13-2-is-here-with-enterprise-and-security-updates/

Rounding out several days of OS updates that included iOS 11.2, tvOS 11.2, and watchOS 4.2, Apple today rolled out macOS High Sierra 10.13.2 for supported Macs. You can download the update now from the Mac App Store.

The update offers no new features; rather, it is focused mostly on enterprise and security updates. Consumer-facing changes include improved compatibility with some third-party USB devices and accessibility changes like improved VoiceOver navigation in Preview and Braille in the Mail app. The enterprise updates improve keychain performance and fix a few bugs.