MFSA2021-49 Firefox: Security Vulnerabilities fixed in Firefox ESR 91.3 (CVE-2021-38509)
4
(AV:N/AC:M/Au:N/C:N/I:P/A:N)
11/02/2021
11/04/2021
11/03/2021
01/05/2022
Description
Due to an unusual sequence of attacker-controlled events, a Javascript alert() dialog with arbitrary (although unstyled) contents could be displayed over top an uncontrolled webpage of the attacker's choosing. This vulnerability affects Firefox < 94, Thunderbird < 91.3, and Firefox ESR < 91.3.
Solution(s)
- mozilla-firefox-esr-upgrade-91_3
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