According to TheH Security:
The latest update to the Windows version of Apple's popular iTunes media player closes an alarming number of security holes. According to the company, iTunes 10.7 for Windows addresses a total of 163 vulnerabilities, all of which are in the WebKit browser engine used by the media player to display HTML-based pages in its iTunes Store.Note that this refers to the Windows version of iTunes, the OS X version already addresses these security issues. The new version 10.7 of iTunes is available for Windows, and for Mac OS X 10.6.8 or later. The Mac version contains some non-security related fixes.