Cloudflare Page Shield
Compromising the website allows them to introduce phishing pages in a legitimate site or redirect users to malicious sites/sources or steal sensitive data like credit card information while entered into the billing page. Since all these hardly alter the user experience, they go undetected until checked.
maybe allowed at the start as legitimate, but if the operator chooses to push a malicious code through it to infect the website, Cloudflare may not be able to detect it as it’s coming from a legitimate source. Cloudflare announced to introduce more features in the future to make this tool more useful.