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MFSA2021-48 Firefox: Security Vulnerabilities fixed in Firefox 94 (CVE-2021-43531)

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MFSA2021-48 Firefox: Security Vulnerabilities fixed in Firefox 94 (CVE-2021-43531)

Severity
4
CVSS
(AV:N/AC:M/Au:N/C:P/I:N/A:N)
Published
11/02/2021
Created
12/09/2021
Added
12/08/2021
Modified
12/13/2021

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.

Solution(s)

  • mozilla-firefox-upgrade-94_0

References

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