There is some good news and bad news for us this time. The good news is that p0sixninja, veteran hacker and member of Chronic Dev Team, is now working on finding exploits for iOS 7 jailbreak untethered whereas the bad news for all of those who have updated their devices to 6.1.3 firmware as they can't jailbreak for the time being. However, users currently running 6.1.3 can only downgrade back to 6.1.2 and then re-jailbreak. Hit the read more jump to take a look at the tweet from his official handle below.
From the above tweets it is clear, he will not be blowing up all the discovered security vulnerabilities for an iOS 6.1.3 jailbreak untethered and preserve them for iOS 7 or 7.1 surely. 

 Earlier yesterday, Joshua Hill aka p0sixninja tweeted that he might just make the entire next untethered jailbreak by himself because he had discovered all the necessary security exploits and vulnerabilities needed to forge a working iOS 7 jailbreak.

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