Breaking: #64229 - Trim submitted login-form-data before usage¶
See Issue #64229
Data submitted through the login-forms (frontend and backend) will now be trimmed before the login is performed. So now all fields (like username or password) with leading/trailing whitespace will have those removed. Any whitespace inside fields will not be touched.
Users that have had whitespace at the beginning or end of their username or password will not be able to log in anymore.
Any installation relying on whitespace at the beginning or end of either a username or a password. Please note that the TYPO3 backend didn't allow whitespace for username in frontend or backend and only allowed whitespace for passwords of backend users until now.
Update usernames and/or passwords.