No action is needed on your part.
This covers PHP Versions 5.2, 5.3, 5.4, 7.0, 7.1, 7.2, 7.3, 7.4, 8.0, 8.1, 8.2, 8.3, 8.4, and 8.5.
We now have a full writeup on our blog detailing the incident and our response. You can see it here:
PHP2Shell: How MDDHosting Responded to the Critical PHP Security Vulnerabilities (opens in a new tab)