According to Flash Player Release Notes Adobe has released a Priority 1 Security & Stability Update on April 14, 2015.
If you haven't updated your Flash Player after
April 14, 2015, please do so from here:
** Always check and confirm that your browser address bar is pointing to
adobe.com before you download the installer.
Also, when you Download the Updated version, notice that Adobe optionally provides
McAfee Security along with Flash Player. That's fine if you don't have any
Antivirus Software installed on your System. However, if you already have an Antivirus Software installed on your PC,
you better uncheck that option before you click Install Now.