Opened 4 years ago

Last modified 5 weeks ago

#17157 assigned New feature

CSRF fails in cross-domain iframes on IE

Reported by: akaihola Owned by: joshkehn
Component: Documentation Version: master
Severity: Normal Keywords: csrf iframe ie
Cc: Triage Stage: Accepted
Has patch: no Needs documentation: yes
Needs tests: no Patch needs improvement: no
Easy pickings: no UI/UX: no


Internet Explorer >=6
blocks third-party cookies by default.
This causes CSRF to fail
for forms which are in iframes which come from a different domain. The user gets this message:

Forbidden (403)
CSRF verification failed. Request aborted.

When a developer hits this problem,
possible solutions

None of the solutions can be made for the developer by Django,
so the best Django can do is to provide a note about this corner case in the
Scenarios section of the CSRF documentation.

Change History (7)

comment:1 Changed 4 years ago by lukeplant

  • Needs documentation unset
  • Needs tests unset
  • Patch needs improvement unset
  • Triage Stage changed from Unreviewed to Accepted

comment:2 Changed 3 years ago by susan

  • Owner changed from nobody to susan
  • Status changed from new to assigned

comment:3 Changed 2 years ago by jedierikb@…

A few questions about this and the proposed workarounds.

  1. Could you elaborate bring the iframed page under the same domain as the main page? When using a javascript library like jQuery File Upload, their javascript dynamically creates an iFrame with a form. How could the use of the library or the library itself be adjusted so as to avoid the problems described in this bug? Does it matter if the library is loaded from another site hosted elsewhere?
  1. Can you pass CSRF credentials as URL parameters? This is suggested by the author of the jQuery File Upload library here What are the concerns, precautions to take when doing this?

comment:4 Changed 2 years ago by akaihola

Unfortunately I can't recall details of the upload functionality I was implementing when I created this ticket. I would assume that I wasn't using any JavaScript library but made a plain HTML form inside an iframe.

In this case a straightforward solution would have been getting rid of the requirement of serving the iframe contents from a separate subdomain. That's what I probably meant by "bring the iframed page..".

CSRF in query parameters would probably work. I don't seem to have thought of it back then.

comment:5 Changed 2 years ago by anonymous

  • Owner susan deleted
  • Status changed from assigned to new

comment:6 Changed 2 years ago by timo

  • Easy pickings unset

comment:7 Changed 5 weeks ago by joshkehn

  • Needs documentation set
  • Owner set to joshkehn
  • Status changed from new to assigned

Will be adding documentation specific to IE >=6 and iframes.

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