Action.OpenUrl with a top-level browsing context#8588
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While HTML links [launch without an opener reference][spec], [`window.open`][vulnerability] provides a reference to the parent page through an auxiliary browsing context. Given untrusted URL input, this can lead to tabnabbing and phishing attacks. This change uses the [noopener] and [noreferrer] [window features] for the default link handler in the React renderer. [spec]: whatwg/html#4078 [vulnerability]: https://mathiasbynens.github.io/rel-noopener/ [window features]: https://developer.mozilla.org/en-US/docs/Web/API/Window/open#windowfeatures [noopener]: https://developer.mozilla.org/en-US/docs/Web/HTML/Attributes/rel/noopener [noreferrer]: https://developer.mozilla.org/en-US/docs/Web/HTML/Attributes/rel/noreferrer
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Hi @sch. This pull request has had no recent activity for the past 5 days . Please take the necessary actions (review, address feedback or commit if reviewed already) to move this along. |
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Hi @sch. This pull request has had no recent activity for the past 5 days . Please take the necessary actions (review, address feedback or commit if reviewed already) to move this along. |
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While HTML links launch without an opener reference,
window.openprovides a reference to the parent page through an auxiliary browsing context. Given untrusted URL input, this can lead to tabnabbing and phishing attacks.This change uses the noopener and noreferrer window features for the default link handler in the React renderer. This can be tested with the following card JSON:
{ "type": "AdaptiveCard", "actions": [ { "type": "Action.OpenUrl", "title": "Open Url", "url": "javascript:alert(window.opener.location)" } ], "$schema": "http://adaptivecards.io/schemas/adaptive-card.json", "version": "1.5" }Microsoft Reviewers: Open in CodeFlow