FF139 ExprFeat: Escape < and > in attributes when serialize HTML #39363
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(comment last updated: 2025-05-05 00:14:05) |
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dipikabh
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May 2, 2025
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| This prevents certain exploits where HTML is serialized and then injected back into the DOM. | ||
| The affected methods and properties are: {{domxref("Element.innerHTML")}}, {{domxref("Element.outerHTML")}}, {{domxref("Element.getHTML()")}}, {{domxref("ShadowRoot.innerHTML")}}, and {{domxref("ShadowRoot.getHTML()")}}. | ||
| ([Firefox bug 1941347](https://bugzil.la/1941347)) |
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Same suggestions as in #39364 (review)
And don't miss the period at the end after the bug link :)
hamishwillee
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May 5, 2025
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FF139 escapes
<as<and>as>in attribute values when HTML is serialized (i.e. when reading Element.innerHTML, Element.outerHTML, Element.getHTML(), ShadowRoot.innerHTML, , ShadowRoot.getHTML().This is the experimental features update.
Related docs can be tracked in #39309