Issue
Helpful error messages - Error message is always the same, whether the username or the password are wrong. More detailed messages should be provided, based on concordance with the information stocked in the database for existing usernames.

Standard & Level
WCAG 2 3.3.3 (AA) http://www.w3.org/WAI/WCAG20/quickref/#qr-minimize-error-suggestions

Impact
Moderate

Example Link
http://demo.moodle.net/

Test Steps

1. Enter a user name in the login block
2. Enter the wrong password for the username
3. The message says login and/or password is incorrect