Qixun Zhao of Qihoo 360s Vulcan Team has published a PoC exploit code for critical vulnerabilities in Apple Safari web browser and iOS that could be exploited by a remote attacker to jailbreak an iPhoneX running iOS 12.1.2 and early versions. The exploitation of the flaw is quite simple, the attacker needs to trick victims into opening a specially crafted web page using Safari browser. The PoC code chains two security flaws that were demonstrated at TianfuCup hacking contest in November.”]
Source: https://securityaffairs.co/wordpress/80230/hacking/ios-jailbreak.html