Hmm, that's pretty bad. CSS probably shouldn't be able to read password inputs.
Edit: This doesn't seem to work for me in Chrome 63.0.3239.132
Edit 2: OK, so it appears that this will only work on a password input that updates its "value" attribute with the typed in value. This doesn't happen unless there is JavaScript that updates the value attr with the input.value
Edit: This doesn't seem to work for me in Chrome 63.0.3239.132
Edit 2: OK, so it appears that this will only work on a password input that updates its "value" attribute with the typed in value. This doesn't happen unless there is JavaScript that updates the value attr with the input.value