If not then can set this in the header of the POST using jQuery: var csrf_token =. If you have a CSRF token parameter in your AJAX POST then this will be used. The X-CSRFToken is a setting in the header. If you look at the signed tokens above you notice that the first part is identical. How can the CSRF token of the comment reply form change?Īnswer: The token does not change but the signed token changes, because there also is a timestamp in the signed token. We can use the same CSRF token for all forms on a page. Do different forms on a page require different CSRF token?Īnswer: This is more a general question. This means that if your session lives shorter than your CSRF token expire time you can get CSRF errors.
The reason is that the CSRF raw token is stored in the session. There is another condition when your CSRF token expires and that is when the session expires. As expected, a CSRF exception was raised. To verify this I put a page with a form on the screen, then changed the default time_limit to 10 seconds and then submitted the form. This would mean that the start time is in the CSRF token. The generate_csrf() function does not include a time_limit parameter while the validate_csrf does. This is not important to know unless you want to change the expire time inside your application. There can be two possible ways how this is implemented: We already saw that the CSRF token expire time can be controlled with: app.config = 5 But we can see that the generated token is signed and includes a timestamp. The above functions do something like a black box. Print(fname + ': form.errors, field = '.format(validated)) Print(fname + ': form.errors = '.format(form.errors))įor field, errors in (): Print(fname + ': no validate_on_submit errors, processing form') What is going on?Īpp.config = 'some-secret-key' I have many forms, mostly in the admin section, and they have been working with CSRF protection all the time without any CSRF error. There was in fact a CSRF error but not a CSRF exception. How is this possible? Did it have to do with the fact that I am using DispatcherMiddleWare or is something else wrong? For me, no exception, which means no CSRF protection.
Clicking the submit button should give a CSRF error, well I expected a CSRF exception. In the debugger I verified that the csrf_token changed to 'ABC'. It should be enabled, let's check if this is true. It's possible you may have logged out or cleared your browser cookies, which could have resulted in the expiry of your current form security token. If you are handling your web forms with the Flask-WTF extension, you are already protected against CSRF on your forms by default. Used Zammad version: Version 3.2.x (3.2.)Used Zammad installation source: DEBOperating system: Ubuntu 18.04.3 LTSBrowser + version: Chrome, Firefox, EdgeIntegrations. Form Security Token missing or expired We could not complete this action due to a missing / expired security form token (CSRF Token). Is it enabled by default? From the Flask_WTF extension documentation:Īny view using FlaskForm to process the request is already getting CSRF protection.Īnd from the text of Miguel Grinberg's post 'Cookie Security for Flask Applications': I never really checked if CSRF protection was working in my Flask application, this website.
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