Security Update 2014-002 is recommended for all users and improves the security of OS X. This update also includes Safari 7.0.3.
For detailed information about the security content of this update, please visit: http://support.apple.com/kb/HT1222
For information on the content of Safari 7.0.3, please visit this website: http://support.apple.com/kb/HT6195
You can download the update by selecting Software Update from the Apple menu at the top left of your screen.