OS X (v10.8.3), Security update 2013-001 and Safari Webkit updated to 6.0.3

Apple has released security updates for OS X (v10.8.3), security update 2013-001 and security updates for Safari Webkit 6.0.3 to address multiple vulnerabilities. The vulnerabilities could potentially allow remote attackers to execute arbitrary code, bypass authentication, leverage additional attacks, cause a denial-of-service condition, obtain sensitive information or have an unexpected application termination or arbitrary code execution by visiting a maliciously crafted website. It is recommended that you update your software to the latest versions through the use of Software Update.

More information: