Remediation Steps
Follow the steps below to remediate this finding on Plesk.
In the Plesk control panel, navigate to Domains > your domain > SSL/TLS Certificates.
Click the Let's Encrypt button to obtain a free trusted certificate, or click Add SSL/TLS Certificate to upload a certificate from a commercial CA.
Ensure the full certificate chain is included when uploading.
Assign the certificate to the domain under Hosting Settings.