with the screen locked, activating the 'unlock screen'-widget and entering any (even nothing) password the screen unlocks. Reproducible: Always Steps to Reproduce: 1.let screen lock (through timeout or per lock-button) 2.enter any password 3.screen is unlocked One may loose data if anyone is able to unlock your screen, that's why the critical severity.
Forgot to mention something which is needed to reproduce this bug: you need to start 2 new sessions. The third one (VT:9) will accept any password, even -nothing-.
It seems that one user could log in without a password. Changing the pass reaolved the problem, or at least i cannot reproduce it any more. Thanks.