vulnerability

Alma Linux: CVE-2021-4140: Important: thunderbird security update (Multiple Advisories)

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Severity

CVSS

(AV:N/AC:L/Au:N/C:C/I:C/A:C)

Published

Jan 12, 2022

Added

May 4, 2022

Modified

Mar 31, 2026

Description

It was possible to construct specific XSLT markup that would be able to bypass an iframe sandbox. This vulnerability affects Firefox ESR < 91.5, Firefox < 96, and Thunderbird < 91.5.

Solutions

alma-upgrade-firefoxalma-upgrade-thunderbird

References

CVE-2021-4140
https://attackerkb.com/topics/CVE-2021-4140
CWE-91
EUVD-EUVD-2021-34009
https://errata.almalinux.org/8/ALSA-2022-0129.html
https://errata.almalinux.org/8/ALSA-2022-0130.html
https://euvd.enisa.europa.eu/vulnerability/EUVD-2021-34009

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