What is JSON based CSRF?
Usually, JSON is CSRF-safe, but only when requests with content-type other than application/json gets rejected or additional CSRF protection is in place (Authorization headers/API keys). In another case, JSON CSRF can be achieved using the form with text/plain content-type, and well-formatted JSON request.
What should be content type for JSON?
The right content type for JSON is application/json UNLESS you’re using JSONP, also known as JSON with Padding, which is actually JavaScript and so the right content type would be application/javascript . There is no doubt that application/json is the best MIME type for a JSON response.
How do you use CSRF tokens in flask?
To enable CSRF protection globally for a Flask app, register the CSRFProtect extension. CSRF protection requires a secret key to securely sign the token. By default this will use the Flask app’s SECRET_KEY . If you’d like to use a separate token you can set WTF_CSRF_SECRET_KEY .
What is a JSON file used for?
JavaScript Object Notation (JSON) is a standard text-based format for representing structured data based on JavaScript object syntax. It is commonly used for transmitting data in web applications (e.g., sending some data from the server to the client, so it can be displayed on a web page, or vice versa).
What is application json format?
When does a CSRF attack on JSON work?
Note: This csrf attack only works when the application do only rely either on json formatted data or Content-type application/json, and data format check, if there is any additional csrf token/referer check at place this will not work.
When does content-type must be application / json?
I am testing web application for which business actions are done by sending JSON requests like for example: The problem is that it will be send with header Content-Type: text/plain, but the server only accepts Content-Type: application/json; charset=utf-8.
Can a JSON POST request be rejected with a 400?
Any POST request with a content-type other than application/json will be rejected with a 400. For example, a POST request with content-type application/x-www-form-urlencoded would be thus rejected. All GET requests will be Safe, and thus not modify any server-side data.
Can a CSRF request be made using XHR?
Forging arbitrary CSRF requests with arbitrary media types is effectively only possible with XHR, because a form’s method is limited to GET and POST and a form’s POST message body is also limited to the three formats application/x-www-form-urlencoded, multipart/form-data, and text/plain.