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Snow can be bypassed with document.open('', '', '') #64

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rwaldron opened this issue Jan 23, 2023 · 2 comments
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Snow can be bypassed with document.open('', '', '') #64

rwaldron opened this issue Jan 23, 2023 · 2 comments
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vulnerability Introduces snow bypass

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@rwaldron
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rwaldron commented Jan 23, 2023 •
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Reproduce by running:

const w = document.open('', '', '')
w.parent.alert.call(window, 'x');

In https://lavamoat.github.io/snow/demo/
@rwaldron
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Ref: https://html.spec.whatwg.org/multipage/dynamic-markup-insertion.html#opening-the-input-stream

@weizman weizman mentioned this issue Jan 24, 2023
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weizman commented Jan 24, 2023

Always fun learning weird web stuff - thank you @rwaldron! fixed #65

@weizman weizman closed this as completed Jan 24, 2023
@weizman weizman added the vulnerability Introduces snow bypass label Jun 22, 2023
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@rwaldron @weizman