cPanel /Host / Access to phpMyAdmin

The phpMyAdmin which comes with cPanel (in the 3rdparty-directory) is apparently secured with the cpanel-authentication, so the answer is "no".

You could install your own phpMyAdmin (maybe it's even available in the script-center/one-click-installer) and set it up to directly authenticate on the MySQL-server with your custom MySQL-user or just let your user enter his credentials which you have supplied.

As I was looking for an answer to this question, I found the following method that did the job for me:

How to access phpMyAdmin directly from my domain?

This worked well for me, although I'm using a different hosting provider then Siteground.

Steps I followed:

• Downloaded the phpmyadmin installation package. I found the appropriate version, as hosted on my server at sourceforge.net/projects/phpmyadmin/files/phpMyAdmin
• Extracted the package.
• Uploaded the files into a suitable folder. I used: public_html/phpmyadmin/
• Now, via the direct URL [http://yourdomain.com/phpmyadmin] I can strictly grant access to a specific database, I have created in cPanel (using the specific user name + password).

Please note this extra security measure:

• For additional security we would also recommend you to Password Protect the directory in which the tool is installed.