On Oct 6, 2006, at 10:35 AM, Clinton Gormley wrote:

I'm testing my current site for XSS vulnerabilities, and I came across
this one on:

http://ha.ckers.org/xss.html

well, not MP related but

if you let users embed flash / etc in profile pages, make sure you strip object tags -- just use the embed

also add
        allowScriptAccess="never"
        allownetworking="internal"

without that, you can use getURL from within flash to call arbitrary code

most social networks have. but i *think* friendster still hasn't done it yet.. there's a popular hack amongst east-asian teens right now to include a flash file onto their profile pages that includes an external JS which alters the DOM tree to skin it any-which-way they want.


// Jonathan Vanasco

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