Methods to check if MOD_Security has been loaded can be found here.
stackoverflow.com/questions/3182500/detect-if-mod-security-is-installed-with-php
CPANEL often allows you to turn it off.
Or you can try disabling it by adding this to your .htaccess
<IfModule mod_security.c>
SecFilterEngine Off
SecFilterScanPOST Off
</IfModule>
Or you will have to contact your hosting provider.