vulnerability
Debian: CVE-2021-43542: firefox-esr, thunderbird -- security update
| Severity | CVSS | Published | Added | Modified |
|---|---|---|---|---|
| 4 | (AV:N/AC:M/Au:N/C:P/I:N/A:N) | Dec 8, 2021 | Dec 30, 2021 | Aug 15, 2025 |
Severity
4
CVSS
(AV:N/AC:M/Au:N/C:P/I:N/A:N)
Published
Dec 8, 2021
Added
Dec 30, 2021
Modified
Aug 15, 2025
Description
Using XMLHttpRequest, an attacker could have identified installed applications by probing error messages for loading external protocols. This vulnerability affects Thunderbird < 91.4.0, Firefox ESR < 91.4.0, and Firefox < 95.
Solutions
debian-upgrade-firefox-esrdebian-upgrade-thunderbird
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