If I set actions for logged in users to be performed through HTTP methods other than GET or POST, then Javascript HTTP requests respecting the Same Origin Policy (SOP) or Cross-Origin Resource Sharing (CORS) is the only way to perform those actions with credentials isn't it? (Since it seems to not be possible with basic HTML.)
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David
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user2284570
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Of course, reading server response isn’t required for performing the actions. – user2284570 Jan 27 '18 at 18:14
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3Possible duplicate of Exploiting CSRF PUT request, GET and POST request vulnerable to CSRF attack?, How does the same-origin-policy protect against PUT/DELETE CSRF?. – Steffen Ullrich Jan 27 '18 at 18:23
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In modern browsers, requests with methods other than HEAD, GET and POST can't be sent cross-origin without a CORS permission.
If your application verifies that the request method is, say, PUT, an attacker can't forge that request in a CSRF attack, unless you explicitly give permission, e.g. with an Access-Control-Allow-Methods: PUT header.
See also: Examples of access control scenarios
Arminius
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