Why are cross-origin requests dangerous?
If cross-origin requests are allowed, a malicious website can effectively impersonate the user. Suppose you have a common home router, such as a Linksys WRT54g or something. Suppose that router allows cross-origin requests. A script on my web page could make HTTP requests to common router IP addresses (like 192.168.
Can you post to another domain?
So JavaScript code within a page can post to arbitrary domain or submit forms within that page to anywhere (unless the form is in an iframe with different url).
Is enabling CORS safe?
It is fairly secure, but there are ways to circumvent things. For example, an attacker could use a DNS poisoning technique to cause a preflight request to hit the actual server, but send the actual CORS request to the rogue server.
Is subdomain considered cross-domain?
2 Answers. Sub-domains are considered different and will fail the Same Origin Policy unless both sub-domains declare the same document. domain DOM property (and even then, different browsers behave differently). You can only make an XHR request to the same host, port, and protocol.
How to send a cross domain POST request?
If you control the remote server, you should probably use CORS, as described in this answer; it’s supported in IE8 and up, and all recent versions of FF, GC, and Safari. (But in IE8 and 9, CORS won’t allow you to send cookies in the request.)
What makes HTML cross domain form posting inefficient?
But what makes these POST requests inefficient is that these requests lack antiforgery tokens, so are ignored by the other url. Moreover, if the JavaScript tries to get that security tokens, by sending AJAX request to the victim url, it is prevented to access that data by Same Origin Policy.
Can a cross-domain POST request work in Safari?
According to their docs, it should “work in browsers that support cross-site XMLHttpRequest”. This is a bit misleading however, as I THINK only modern browsers allow cross domain POST. I have only verified this works with safari,chrome,FF 3.6. You will have to think about the security implications.
How to enable cross origin requests in ASP.NET?
Using CORS, a server can explicitly allow some cross-origin requests while rejecting others. CORS is safer and more flexible than earlier techniques such as JSONP. This tutorial shows how to enable CORS in your Web API application. Web API 2.2 This tutorial demonstrates CORS support in ASP.NET Web API.