MFSA2021-49 Firefox: Security Vulnerabilities fixed in Firefox ESR 91.3 (CVE-2021-38503)
8
(AV:N/AC:L/Au:N/C:P/I:P/A:P)
11/02/2021
11/04/2021
11/03/2021
11/26/2024
Description
The iframe sandbox rules were not correctly applied to XSLT stylesheets, allowing an iframe to bypass restrictions such as executing scripts or navigating the top-level frame. 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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