Not true!
I actually had a discussion with Avast! when I found this "exploit".. It works for all current versions. Avast! responded with, yeah we know, and we won't fix it, it was made by design.
Boot into Safe Mode then go to the following directory..
C:\ProgramData\AVAST Software\Avast\aswResp.dat
Delete that file and reboot, your password should be gone.