Apple has just released iOS 7.0.2 as an over-the-air software update. This should fix any Lock screen bypasses in which users can bypass your passcode and gain access to your device. The update is available for all iOS 7 enabled devices.
The exact wording on the update in reference to passcode bypasses is as follows:
Fixes bugs that could allow someone to bypass the Lock screen passcode
Other than that, the only other release notes deal with adding a Greek keyboard option for passcode input. If you see anything else, let us know in the comments. We'll update if we find anything else out!
In the mean time, you can grab the update by tapping into Settings > General > and Software Update.