description: 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.
problem types: Web Extensions could access pre-redirect URL when their context menu was triggered by a user
affected:
{
product: Firefox
vendor: Mozilla
versions:
lessThan: 94, status: affected, version: unspecified, versionType: custom
}