Looking to facilitate cross domain AJAX requests and need some clarification.
Access-Control-Allow-Origin to * the only way to allow requests from any site, and are there security concerns associated with this?Can CORS be enabled for Internet Explorer versions prior to IE8?
Regrettably, no. Support for CORS in IE did not begin until the introduction of Microsoft's XDomainRequest with IE8.
Apart from permitting all websites to make requests, are there any security concerns with setting Access-Control-Allow-Origin to *?
Technically no, but using a wildcard presents potential security vulnerabilities. It is recommended to set up a whitelist unless you truly require all origins to have access.
Regarding client-side security, does a CORS request automatically include cookies by default when sending AJAX requests to a server? Can this behavior be changed?
That is correct. By default, a CORS request does not send cookies to the server, but it can be configured to do so by setting the XHR's withCredentials property.
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