You don't what to expose exploits to Apple so they can fix the exploits with a new firmware version, at least not until there is just something that everyone must have. Plus most of the exploits take massive amounts of time and effort and hell there may not be another exploit at this time. Don't update your iPhone and check back in a few days or when a new firmware is released for a jailbreak to the previous version. iPhone 5s will be announced at the end of June with a large update. A while after that is when the jailbreak exploit if there is one will be shared for all.