Apple posts Safari 7.0.4/6.1.4 with fixes for WebKit vulnerabilities.
"Following the release of OS X 10.9.3, iTunes 11.2 and the subsequent iTunes 11.2.1 update (which fixed the disappearing Users folder in OS X 10.9.3), Apple on Wednesday issued a pair of Safari updates for OS X Lion, Mountain Lion and Mavericks systems."
If this is software you use (I do) I would recommend you open the link and read up on this.
Source : idownloadblog
http://www.idownloadblog.com/2014/05/21/apple-releases-safari-bug-fixes/