Flash unanswered security questions

If i have flash player v11 and v13 both installed with Firefox on win 7 64bit..

I know exactly how to uninstall it but will the latest version out of the two always be the one used? or is it possible a website could request the older version

with security flaws exposing security risk?

Now regarding the CVE-2014-0515 Buffer Overflow exploit

in adobe flash player 13:

Please tell me the mitigating factors e.g. " user would have to click a crafted website" or "if microphone and camera

access set to deny all then not affected"

when Microsoft releases a security update they include this information which is helpful so if you could do the same..

Thank you