GHSA-wjqw-r9x4-j59v Parse Server affected by empty authData bypassing credential requirement on signup

• npm parse-server: >= 9.0.0, < 9.6.0-alpha.29 → fixed in 9.6.0-alpha.29 • npm parse-server: < 8.6.49 → fixed in 8.6.49

Impact A user can sign up without providing credentials by sending an empty `authData` object, bypassing the username and password requirement. This allows the creation of authenticated sessions without proper credentials, even when anonymous users are disabled. Patches The fix ensures that empty or non-actionable `authData` is treated the same as absent `authData` for the purpose of credential validation on new user creation. Username and password are now required when no valid auth provider data is present. Workarounds Use a Cloud Code `beforeSave` trigger on the `_User` class to reject signups where `authData` is empty and no username/password is provided.