vulnerability
MFSA2022-03 Thunderbird: Security Vulnerabilities fixed in Thunderbird 91.5 (CVE-2021-4140)
| Severity | CVSS | Published | Added | Modified |
|---|---|---|---|---|
| 10 | (AV:N/AC:L/Au:N/C:C/I:C/A:C) | Jan 11, 2022 | Jan 12, 2022 | Aug 12, 2025 |
Severity
10
CVSS
(AV:N/AC:L/Au:N/C:C/I:C/A:C)
Published
Jan 11, 2022
Added
Jan 12, 2022
Modified
Aug 12, 2025
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.
Solution
mozilla-thunderbird-upgrade-91_5
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