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Web Share API can be triggered from iframe sandbox #155

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shhnjk opened this issue May 20, 2020 · 1 comment
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Web Share API can be triggered from iframe sandbox #155

shhnjk opened this issue May 20, 2020 · 1 comment

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@shhnjk
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shhnjk commented May 20, 2020

CSP/iframe sandbox aren't allowed to open popups or escape sandbox restriction unless "allow-popups" or "allow-popups-to-escape-sandbox" is set respectively.

However, when "allow-scripts" is specified, sandboxed document can trigger Web Share API, which might allow escaping CSP/iframe sandbox because Web Share Target now supports PWA.
@mgiuca
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mgiuca commented Jul 24, 2020

I believe this has been fixed by #166; it should no longer be allowed to use it from an iframe without the appropriate feature policy.

@mgiuca mgiuca closed this as completed Jul 24, 2020
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