iOS 7 has been jailbroken. Popular iOS developer Ryan Petrich has posted a screenshot which appears to show Activator running on iOS 7.
Earlier today Petrich
System Version Too New
Activator has not been tested to work with this version of iOS. Some features may not work as designed.
Notably, this alert does not seem to be a UIAlert that could be generated from within a sandboxed application, suggesting that device may be jailbroken.
It’s unclear what expoit was used by Petrich. Last year Apple had closed comex’s developer account based exploit that had been used by hackers to root their iDevices for two years.