Apple has just released a pair of software updates for its Safari web browser addressing multiple Webkit vulnerabilities in Mac OS X. All of the 21 security flaws address the iOS browser vulnerabilities proliferating through the Safari’s open-source Webkit rendering engine. This webkit vulnerability allows a malicious website to execute an arbitrary code on the host computer or unexpected termination of an application in an effort to compromise users’ confidential information. The released patches are important to update and if not, could leave your system exposed to arbitrary code execution attacks.
Source: https://thehackernews.com/2014/05/apple-patches-22-safari-webkit.html