Recently announced the discovery of a serious Android WebView component in Android 4.3 and earlier systems, which summoned a number of security researchers who discovered the gap with Google Inc. to repair, but the surprise was great after rejecting Google because they no longer provide security support for Android 4.3 and earlier systems.
And can a WebView applications by default access to Web pages, but Google suspended since the month of July security support for Android 4.3 since it moved to newer Android systems 4.4 Kit Kat and the new Android, which means that the Google fixes this vulnerability.
But the larger reality is that 60 percent of Google mobile users continue to use Android 4.3 and earlier systems, which means that more than half of the users will be threatened by this gap.