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When a user loaded a Web Extensions context menu, the Web Extension could access the post-redirect URL of the element clicked. If the Web Extension lacked the WebRequest permission for the hosts involved in the redirect, this would be a same-origin-violation leaking data the Web Extension should have access to. This was fixed to provide the pre-redirect URL. This is related to CVE-2021-43532 but in the context of Web Extensions. This vulnerability affects Firefox < 94.
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Mfsa2021 48 | — | Upgrade to Mozilla Firefox version 94.0Upgrade to the latest version of Mozilla Firefox | Dec 8, 2021 | Nov 2, 2021 |
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