CVE-2021-43531

published 2021-12-08

CVE-2021-43531: 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…

Priority P4 16 medium 4.3 CVSS 3.1

AV N AC L PR N UI R S U C L I N A N

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.

Affected

7 ranges

Vendor	Product	Version range	Fixed in
debian	firefox	< firefox 94.0-1 (sid)	firefox 94.0-1 (sid)
mozilla	firefox	< 94.0	94.0
mozilla	firefox	—	—
mozilla	firefox	>= 0 < 94.0+build3-0ubuntu0.18.04.1	94.0+build3-0ubuntu0.18.04.1
mozilla	firefox	>= 0 < 94.0+build3-0ubuntu0.20.04.1	94.0+build3-0ubuntu0.20.04.1
mozilla	firefox	>= 0 < 94.0+build3-0ubuntu1	94.0+build3-0ubuntu1
mozilla	firefox	>= unspecified < 94	94

CVSS provenance

nvd v3.1 4.3 MEDIUM CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N

nvd v2.0 4.3 MEDIUM AV:N/AC:M/Au:N/C:P/I:N/A:N

osv 4.3 MEDIUM

vendor_debian 4.3 MEDIUM

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