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如何防止 iframe 存储的 XSS?

[英]How can prevent Stored XSS by iframe?

I use Extjs and JS to build a dialog where can display my html data from DB, that data is wrapped with iframe like this:我使用 Extjs 和 JS 构建一个对话框,可以在其中显示来自 DB 的 html 数据,该数据用iframe包装,如下所示:

<iframe name="ext-gen568" frameborder="0" src="javascript:;" style="width: 514px; height: 189px;">
<html>
<head> ... </head>
<body>
<br><br>
<blockquote type="cite"> 
    <meta http-equiv="content-type" content="text/html; charset=UTF-8">
    <p>Hello</p>
    <video><source src="x" onerror="alert('xss')"></video>
</blockquote>
</body>
</html>
</iframe>

I tried to add sandbox to iframe , but it doesn't work, the XSS alert still show.我尝试将sandbox添加到iframe ,但它不起作用,XSS 警报仍然显示。

  • Then I tried to change to <iframe src='#'... sandbox> , but XSS alert still show.然后我尝试更改为<iframe src='#'... sandbox> ,但 XSS 警报仍然显示。
  • I removed src or just set it '' in <iframe src=''... sandbox> , it got this error: DOMException: Blocked a frame with origin "mytestdomain" from accessing a cross-origin frame.我删除了src或者只是在 <iframe src= '' <iframe src=''... sandbox>中设置了它,它得到了这个错误: DOMException: Blocked a frame with origin "mytestdomain" from accessing a cross-origin frame.

What should I do to handle my issue?我应该怎么做才能处理我的问题?

Thanks a lot for any help.非常感谢您的帮助。

The issue is fixed by set "allow-same-origin" for sandbox通过为沙盒设置“允许同源”解决了该问题

<iframe sandbox="allow-same-origin" src="javascript:;"...></iframe>

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