By exploiting an Open Redirect vulnerability on a website, an attacker could have spoofed the site displayed in the download file dialog to show the original site (the one suffering from the open redirect) rather than the site the file was actually downloaded from. This vulnerability affects Firefox < 81, Thunderbird < 78.3, and Firefox ESR < 78.3.
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Alpine Linux | — | Upgrade thunderbirdUpgrade firefox-esrUpgrade firefoxUpgrade librewolf | Aug 22, 2024 | Oct 1, 2020 |
| Amazon Linux Ami 2 | — | Upgrade thunderbird-debuginfoUpgrade thunderbird | Dec 10, 2020 | Oct 1, 2020 |
| Arch Linux | — | Upgrade to the latest version of Arch Linux | Jul 11, 2025 | Oct 1, 2020 |
| Centos_linux | — | Upgrade firefox-debuginfoUpgrade firefox-debugsourceUpgrade thunderbird-debuginfoUpgrade thunderbirdUpgrade firefoxUpgrade thunderbird-debugsource | Sep 25, 2020 | Sep 24, 2020 |
| Debian | — | Upgrade thunderbirdUpgrade firefox-esr | Sep 30, 2020 | Sep 30, 2020 |
| Gentoo Linux | — | Upgrade www-client/firefox.Upgrade mail-client/thunderbird.Upgrade www-client/firefox-bin.Upgrade mail-client/thunderbird-bin. | Oct 19, 2020 | Oct 1, 2020 |
| Mfsa2020 42 | — | Upgrade to the latest version of Mozilla FirefoxUpgrade to Mozilla Firefox version 81.0 | Sep 23, 2020 | Sep 22, 2020 |
| Mfsa2020 43 | — | Upgrade to the latest version of Mozilla FirefoxUpgrade to Mozilla Firefox ESR version 78.3 | Sep 23, 2020 | Sep 22, 2020 |
| Mozilla Thunderbird | — | Upgrade to Mozilla Thunderbird version 78.3Upgrade to the latest version of Mozilla Thunderbird | Sep 25, 2020 | Sep 22, 2020 |
| Oracle Solaris | — | Upgrade web/browser/firefox to version 78.3.0-11.4.27.0.1.82.0 on Solaris 11.4Upgrade web/data/firefox-bookmarks to version 78.3.0-11.4.27.0.1.82.0 on Solaris 11.4Upgrade mail/thunderbird to version 78.3.0-11.4.27.0.1.82.0 on Solaris 11.4 | Jan 19, 2021 | Oct 1, 2020 |
| Oracle_linux | — | Upgrade firefoxUpgrade thunderbird | Sep 25, 2020 | Sep 22, 2020 |
| Redhat_linux | — | Upgrade firefox-debugsourceUpgrade thunderbird-debuginfoUpgrade firefoxNo solution existsUpgrade thunderbirdUpgrade firefox-debuginfoUpgrade thunderbird-debugsource | Sep 25, 2020 | Sep 24, 2020 |
| Suse | — | Upgrade mozillafirefox-buildsymbolsUpgrade MozillaThunderbird-translations-commonUpgrade mozillafirefox-branding-upstreamUpgrade mozilla-nspr-32bitUpgrade MozillaThunderbird-translations-otherUpgrade MozillaFirefox-develUpgrade MozillaFirefox-translations-otherUpgrade mozilla-nsprUpgrade MozillaFirefoxUpgrade mozilla-nspr-develUpgrade MozillaFirefox-translations-commonUpgrade MozillaThunderbird | Sep 29, 2020 | Sep 24, 2020 |
| Ubuntu | — | Upgrade firefox | Sep 29, 2020 | Sep 24, 2020 |
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