RSFirewall! in its latest version now includes protection for Helix Ultimate versions below 2.2.7.
Of course, earlier RSFirewall! releases already provided protection for the Helix 3 vulnerability as well as for SP Page Builder.
It is also important to note that RSFirewall! can still be used on Joomla 3, which is helpful for users running older Joomla installations that cannot update Helix 3 or Helix Ultimate to the patched versions.