iThemes Security Pro 8.4.1

Breaking Change: iThemes Security requires PHP 5.4 or later.
New Feature: Make WordPress Security Easy With Passwordless Logins
Enhancement: Make Magic Links work in a wider variety of situations.
Enhancement: New Lockout Template screen.
Bug Fix: WordPress 5.3 Compatibility
Bug Fix: Brute Force module reporting invalid logins using an email address incorrectly.
Developer Note: There were significant changes to the internals of the iThemes Security Lockout API in this release. If you are using the ITSEC_Lockout class directly, all the API functions will continue to work, but will emit deprecation notices. Please update your integrations.

Enhancement: new iThemes Sync Verb support for overriding a specific Two-Factor request.
Bug Fix: Hide Backend Bypass.
Bug Fix: Strict Standards error during Sync request.
Bug Fix: wp_die() if a login interstitial session fails to be created instead of throwing a fatal error.

Enhancement: New iThemes Sync Verb support for File Change.
Tweak: Add additional information about the login attempt when calling the Network Brute Force API.
Bug Fix: Ensure Dashboard classes are always loaded.