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.
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Alma_linux | — | Upgrade thunderbirdUpgrade firefox | May 4, 2022 | Dec 8, 2021 |
| Alpine Linux | — | Upgrade librewolfUpgrade thunderbirdUpgrade firefox-esrUpgrade firefox | Aug 22, 2024 | Dec 8, 2021 |
| Arch Linux | — | Upgrade to the latest version of Arch Linux | Jul 11, 2025 | Dec 8, 2021 |
| Centos_linux | — | Upgrade firefoxUpgrade thunderbird-debugsourceUpgrade thunderbirdUpgrade firefox-debugsourceUpgrade thunderbird-debuginfoUpgrade firefox-debuginfo | Dec 9, 2021 | Dec 8, 2021 |
| Debian | — | Upgrade firefox-esrUpgrade thunderbird | Dec 30, 2021 | Dec 8, 2021 |
| Gentoo Linux | — | Upgrade mail-client/thunderbird.Upgrade www-client/firefox-bin.Upgrade www-client/firefox.Upgrade mail-client/thunderbird-bin. | Feb 22, 2022 | Dec 8, 2021 |
| Mfsa2021 52 | — | Upgrade to Mozilla Firefox version 95.0Upgrade to the latest version of Mozilla Firefox | Dec 8, 2021 | Dec 7, 2021 |
| Mfsa2021 53 | — | Upgrade to the latest version of Mozilla FirefoxUpgrade to Mozilla Firefox ESR version 91.4 | Dec 8, 2021 | Dec 7, 2021 |
| Mozilla Thunderbird | — | Upgrade to the latest version of Mozilla ThunderbirdUpgrade to Mozilla Thunderbird version 91.4 | Dec 8, 2021 | Dec 7, 2021 |
| Oracle Solaris | — | Upgrade web/data/firefox-bookmarks to version 91.4.0-11.4.41.0.1.107.2 on Solaris 11.4Upgrade web/browser/firefox to version 91.4.0-11.4.41.0.1.107.2 on Solaris 11.4Upgrade mail/thunderbird to version 91.4.0-11.4.41.0.1.107.2 on Solaris 11.4 | Jan 19, 2022 | Dec 8, 2021 |
| Oracle_linux | — | Upgrade thunderbirdUpgrade firefox | Dec 9, 2021 | Dec 7, 2021 |
| Redhat_linux | — | Upgrade firefox-debugsourceUpgrade firefoxUpgrade thunderbird-debugsourceUpgrade thunderbirdNo solution existsUpgrade thunderbird-debuginfoUpgrade firefox-debuginfo | Dec 9, 2021 | Dec 8, 2021 |
| Rocky_linux | — | Upgrade firefox-debugsourceUpgrade thunderbird-debuginfoUpgrade firefox-debuginfoUpgrade firefoxUpgrade thunderbird-debugsourceUpgrade thunderbird | Mar 12, 2024 | Dec 8, 2021 |
| Suse | — | Upgrade MozillaFirefox-translations-otherUpgrade MozillaFirefox-translations-commonUpgrade MozillaThunderbirdUpgrade MozillaFirefoxUpgrade mozillafirefox-branding-upstreamUpgrade MozillaFirefox-develUpgrade MozillaThunderbird-translations-commonUpgrade MozillaThunderbird-translations-other | Dec 11, 2021 | Dec 8, 2021 |
| Ubuntu | — | Upgrade thunderbirdUpgrade firefox | Dec 10, 2021 | Dec 8, 2021 |
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