We haven’t been able to independently verify the claim, but as you can see in the screenshot above, you can see the Cydia app on the Home screen of iPhone X. I was also not able to get much information about Pandora Labs, but the report claims that it was established this year, and has 10 researchers. They have submitted several vulnerabilities to Apple, Google, and Huawei.
Unfortunately, Song Yang has also stated that his team doesn’t plan to release the iOS 11.2.1 jailbreak. He said
Although iOS 11.2 fixes some security issues, we confirmed the new iOS will still be jailbroken on the first day it was released. Although we were able to jailbreak iOS 11.2 quickly, we were limited to security research purposes, our team won’t provide any jailbreak tool.
While that is disappointing, the good news is that iOS 11.2.1 can be jailbroken, so we can hope that hackers like the Pangu team can also discover them to release the elusive jailbreak for iOS 11. Since the security researchers were able to jailbreak iOS 11.2.1, it indicates that they discovered another exploit rather than using the tfp0 exploit which was released by Ian Beer as it was applicable for iOS 11.1.2 or lower.
For now, it looks as though the jailbreak community will need to continue waiting for a public tool. With a little luck, perhaps we’ll see another season of jailbreaking.
[Source]