Hello Maxam,
It is the one of CS-Cart system requirements that mod_security should be disabled on the server for proper work of CS-Cart. So we strongly recommend you disable mod_security on your server. Note that you should not worry about disabling it as long as CS-Cart is designed to meet the latest security requirements. For more information please visit the “PCI Compliance” page of our website: Product :: Feature Tour :: PCI Compliance
—
Pavel Zyukin
CS-Cart Support team