The new version of the Absinthe jailbreak tool was released publicly on Friday by the Chronic-Dev Team and iPhone Dev Team. The hack allows users to run unsigned apps on their devices, something that Apple doesn t like so much. Back in January, the same group of developers released a jailbreak for the iPhone 4S. In order to use the jailbreak, users need to download the Jailbreak tool, then back up the content on their device and install the tool. Once the tool is installed, the user then restores the settings and content through iTunes.
Source: https://threatpost.com/absinthe-20-jailbreak-ios-511-devices-released-052512/76614/