vulnerability
MFSA2021-54 Thunderbird: Security Vulnerabilities fixed in Thunderbird 91.4.0 (CVE-2021-43528)
| Severity | CVSS | Published | Added | Modified |
|---|---|---|---|---|
| 4 | (AV:N/AC:M/Au:N/C:N/I:P/A:N) | Dec 7, 2021 | Dec 8, 2021 | Aug 12, 2025 |
Severity
4
CVSS
(AV:N/AC:M/Au:N/C:N/I:P/A:N)
Published
Dec 7, 2021
Added
Dec 8, 2021
Modified
Aug 12, 2025
Description
Thunderbird unexpectedly enabled JavaScript in the composition area. The JavaScript execution context was limited to this area and did not receive chrome-level privileges, but could be used as a stepping stone to further an attack with other vulnerabilities. This vulnerability affects Thunderbird < 91.4.0.
Solution
mozilla-thunderbird-upgrade-91_4
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