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ONLamp.com:
Points of Attack PHP and Ajax
August 28, 2007 @ 11:11:00

Matthew McCool has a few reminders for developers out there thinking of using Ajax in your applications - mainly to remember that it has the potential of adding another vulnerability to your application.

Consider a registration form built out of PHP. Any aspect of your script that accepts and processes data is a potential point of attack. If you add Ajax, what you're doing is increasing the complexity of the application and, by extension, introducing greater vulnerability. More points of entry equal a larger attack surface, and that means potential problems for your application.

He continues his login form example and mentions a few things you could do to help protect your application and its users (including using the escaping functions built in to PHP to help remove some harmful input).

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