know, that this should not be possible with XHR (see e.g. Security for cross-origin resource sharing), at least not, if we trust the W3C spec to be implemented correctly in all modern browsers (can we?) At the end of the day you have to “trust” the client browser to safely store user’s data and protect … Read more
Before reading below make sure you have @csrf or {{ csrf_field() }} in your form like <form method=”post”> @csrf <!– {{ csrf_field() }} –> … rest of form … </form> The Session Expired or 419 Page Expired error message in Laravel comes up because somewhere your csrf token verification fails which means the App\Http\Middleware\VerifyCsrfToken::class middleware … Read more
Note: Disabling CSRF is unsafe from security point of view. Please use your judgement to use the below method. Why this error is happening? This is happening because of the default SessionAuthentication scheme used by DRF. DRF’s SessionAuthentication uses Django’s session framework for authentication which requires CSRF to be checked. When you don’t define any … Read more
The same origin policy is applicable only for browser side programming languages. So if you try to post to a different server than the origin server using JavaScript, then the same origin policy comes into play but if you post directly from the form i.e. the action points to a different server like: <form action=”http://someotherserver.com”> … Read more
You have incorrectly specified the contentType to application/json. Here’s an example of how this might work. Controller: public class HomeController : Controller { public ActionResult Index() { return View(); } [HttpPost] [ValidateAntiForgeryToken] public ActionResult Index(string someValue) { return Json(new { someValue = someValue }); } } View: @using (Html.BeginForm(null, null, FormMethod.Post, new { id = … Read more
Yes. In general, you need to secure your login forms from CSRF attacks just as any other. Otherwise your site is vulnerable to a sort of “trusted domain phishing” attack. In short, a CSRF-vulnerable login page enables an attacker to share a user account with the victim. The vulnerability plays out like this: The attacker … Read more
If you use the $.ajax function, you can simply add the csrf token in the data body: $.ajax({ data: { somedata: ‘somedata’, moredata: ‘moredata’, csrfmiddlewaretoken: ‘{{ csrf_token }}’ },
I use a simple js function like this AddAntiForgeryToken = function(data) { data.__RequestVerificationToken = $(‘#__AjaxAntiForgeryForm input[name=__RequestVerificationToken]’).val(); return data; }; Since every form on a page will have the same value for the token, just put something like this in your top-most master page <%– used for ajax in AddAntiForgeryToken() –%> <form id=”__AjaxAntiForgeryForm” action=”#” method=”post”><%= Html.AntiForgeryToken()%></form> … Read more
You should do this: Make sure that you have <%= csrf_meta_tag %> in your layout Add beforeSend to all the ajax request to set the header like below: $.ajax({ url: ‘YOUR URL HERE’, type: ‘POST’, beforeSend: function(xhr) {xhr.setRequestHeader(‘X-CSRF-Token’, $(‘meta[name=”csrf-token”]’).attr(‘content’))}, data: ‘someData=” + someData, success: function(response) { $(“#someDiv’).html(response); } }); To send token in all requests … Read more
We need to store the JWT on the client computer. If we store it in a LocalStorage/SessionStorage then it can be easily grabbed by an XSS attack. If we store it in cookies then a hacker can use it (without reading it) in a CSRF attack and impersonate the user and contact our API and … Read more