Learn how to configure the ProxmoxCP to enable CORS.

Cross-Origin Resource Sharing (CORS) is an HTTP-header based mechanism that allows a server to indicate any origins (domain, scheme, or port) other than its own from which a browser should permit loading resources. CORS also relies on a mechanism by which browsers make a “preflight” request to the server hosting the cross-origin resource, in order to check that the server will permit the actual request. In that preflight, the browser sends headers that indicate the HTTP method and headers that will be used in the actual request. – MDN Documentation

CORS Configuration can be modified with direct settings in the config.json file.

Key	Default	Description
CORS	false	wether or not CORS is enabled or not
CORS_ALLOW_ORIGIN	“*”	list of origins that will be passed via the “Allow-Origin” header
CORS_ALLOW_METHODS	“GET, POST”	list of request method that will be passed in the “Allowed-Methods” header
CORS_ALLOW_HEADERS	“*”	list of headers that will be passed in the “Allowed-Headers” header