A Pangu jailbreak team member in a recent blog post came up suggesting iOS 9.2.1 update after explaining the security vulnerabilities in current Apple iOS versions for jailbreak. The Pangu team member who is well-known in the jailbreak world by the name of Windknown was also behind the Pangu 9 untethered solution.
The in-depth article by the Pangu member was posted on the official blog. The article is a bit technical explaining iOS 9.2 and iOS 9.2.1 security vulnerabilities and fixes in detail. In short the article suggests upgrading to the iOS 9.2.1 if you are concerned about security while having jailbreak on your iPhone, iPad or iPod Touch.
Technical details aside, the article addresses some key areas about the security loopholes in the iOS versions. According to the article the iOS 9.2.1 contains several security fixes which prevent you from attacks through unknown origin App. Against the vulnerable iOS 9.2, the fixes on the iOS 9.2.1 block malicious code from being executed on the device.
The reports seem explaining the security concerns with the currently available jailbreaks. Also explaining the security loopholes and suggesting fixes, the article hints to the upcoming iOS 9.2.1 jailbreak. It is though apparently intended to provide information about the security on current iOS jailbreak options but you can get an insight into the core advantages in the iOS 9.2.1 jailbreak.
Concluding the article, we can get some recommendations for the users yet thinking about having jailbreak on their iOS devices. As mentioned in the article, with the security vulnerabilities it will be better for users to skip the iOS 9.2 jailbreak and wait for an upcoming jailbreak from the Pangu team. The same was recommended earlier by some other analysts, suggesting an expected iOS 9.3 and iOS 9.2.1 jailbreak. If you still want to stay on the iOS 9.2, than it suggest staying away from non-App Store apps until the security vulnerability is removed.