Remediation Steps
Follow the steps below to remediate this finding on Joomla.
Edit the .htaccess file in the Joomla root directory and add:
<IfModule mod_headers.c> Header always set Strict-Transport-Security "max-age=31536000; includeSubDomains; preload" </IfModule>Alternatively, install the SecurityHeaders extension from the Joomla Extension Directory.