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Jani Hartikainen's Blog:
How to CSRF protect all your forms
October 16, 2008 @ 12:07:26

Jani Hartikainen has posted a few ideas on cross site request forgeries in a new blog entry, including some methods to help prevent it in your application.

CSRF, or Cross-Site Request Forgery, is a vulnerability very common in websites. [...] This can be dangerous, especially if your admin interface is compromised: There may be a button on the other site which goes to your admin interface and deletes the latest blogpost for example - and you wouldn't want that!

His method is a three-step process for protection - use POST, protect against cross-site scripting and use a CSRF key in the form to help prevent abuse. A simple script is included to show it working and is adapted to work in a controller plugin for the Zend Framework.

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