Cloudflare Page Shield helps you monitor your applications’ Javascript dependencies for suspicious activity and protect your visitors from Magecart style attacks.
Page Shield monitors potential attack vectors from third party scripts and prevents user information from falling into the hands of hackers, where it can be resold or used to launch additional attacks such as credit card fraud and identity theft.
Page Shield uses a feature named ‘Script Monitor’ to record your site’s JavaScript dependencies over time. New JavaScript dependencies trigger alerts so application owners can investigate whether or not they were expected changes.