JoomShaper Helix3 <=3.1.0 - Unauthenticated Arbitrary JSON File Write

JoomShaper Helix3 template framework versions 1.0 through 3.1.0 for Joomla expose an unauthenticated AJAX handler plgajaxhelix3 accessible via the Joomla comajax component. The onAjaxHelix3 plugin method processes dataaction=save requests without any authentication check or CSRF token validation...