WordPress Security Check shows an error:
Clicking Secure button does not fix the issue.
"Permissions for files and directories" checker function changes permissions for non-WordPress files and directories. This is Plesk internal issue with id #PPP-17596, which is planned to be fixed in future Plesk updates.
Manually change the permissions for all subdirectories of
DocumentRoot directory of the domain\ subdomain. In the example below the proper permissions are set for
# chmod 755 ./example.com/subdomain.example.com/cgi-bin/