Having a permissive Cross-Origin Resource Sharing policy is security-sensitive. It has led in the past to the following vulnerabilities:
Same origin policy in browsers prevents, by default and for
security-reasons, a javascript frontend to perform a cross-origin HTTP request to a resource that has a different origin (domain, protocol, or port)
from its own. The requested target can append additional HTTP headers in response, called CORS, that act like directives for the browser and change the access control policy
/ relax the same origin policy.
