It was only a couple of days back when Apple stopped signing its iOS 10.3.1 firmware which means there won’t be any more upgrades or downgrades to this firmware. Though it may not matter much when it comes to such firmware with no jailbreak available for the public, a jailbreak demo was still presented by Pangu team but they did not release it for general customers.
So, as Apple has stopped signing iOS 10.3.1 firmware, the iOS 10.3.2 remains to be the only and latest Apple-signed public firmware available. Besides, Apple is signing the public as well as developer betas for both iOS 10.3.3 and iOS 11. And they will be released for download pretty soon as well.
Last week in Shanghai, at MOSEC 2017, KeenLab demonstrated working jailbreaks for iOS 10.3.2 as well as iOS 11 beta. In fact, it was the very first demo for both these firmware versions. Though we can’t say at this point that the jailbreak introduced by Keenlab will ever make it to general public, it’s enough evidence to say that hackers are continuously bypassing security checks set forth by Apple for the purpose of research and jailbreak.
So, the advice right now for you is that if you already have a jailbroken version of iOS then you should better stay at that lowest working firmware possible until the jailbreak for the latest versions arrives for general public.