A malicious extension could have opened a popup window lacking an address bar. The title of the popup lacking an address bar should not be fully controllable, but in this situation was. This could have been used to spoof a website and attempt to trick the user into providing credentials. This vulnerability affects Firefox ESR < 78.9, Firefox < 87, and Thunderbird < 78.9.
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Alma_linux | — | Upgrade firefoxUpgrade thunderbird | May 4, 2022 | Mar 31, 2021 |
| Alpine Linux | — | Upgrade firefox-esrUpgrade firefoxUpgrade thunderbirdUpgrade librewolf | Jun 17, 2022 | Mar 31, 2021 |
| Amazon Linux Ami 2 | — | Upgrade thunderbirdUpgrade thunderbird-debuginfo | Apr 23, 2021 | Mar 31, 2021 |
| Centos_linux | — | Upgrade firefox-debugsourceUpgrade thunderbird-debugsourceUpgrade thunderbirdUpgrade firefox-debuginfoUpgrade firefoxUpgrade thunderbird-debuginfo | Mar 26, 2021 | Mar 25, 2021 |
| Debian | — | Upgrade thunderbirdUpgrade firefox-esr | Mar 26, 2021 | Mar 26, 2021 |
| Gentoo Linux | — | Upgrade www-client/firefox.Upgrade mail-client/thunderbird-bin.Upgrade www-client/firefox-bin.Upgrade mail-client/thunderbird. | May 3, 2021 | Mar 31, 2021 |
| Mfsa2021 10 | — | Upgrade to the latest version of Mozilla FirefoxUpgrade to Mozilla Firefox version 87.0 | Mar 24, 2021 | Mar 23, 2021 |
| Mfsa2021 11 | — | Upgrade to Mozilla Firefox ESR version 78.9Upgrade to the latest version of Mozilla Firefox | Mar 24, 2021 | Mar 23, 2021 |
| Mozilla Thunderbird | — | Upgrade to the latest version of Mozilla ThunderbirdUpgrade to Mozilla Thunderbird version 78.9 | Mar 24, 2021 | Mar 23, 2021 |
| Oracle Solaris | — | Upgrade mail/thunderbird to version 78.9.0-11.4.32.0.1.88.3 on Solaris 11.4Upgrade web/browser/firefox to version 78.9.0-11.4.32.0.1.88.3 on Solaris 11.4Upgrade web/data/firefox-bookmarks to version 78.9.0-11.4.32.0.1.88.3 on Solaris 11.4 | Apr 21, 2021 | Mar 31, 2021 |
| Oracle_linux | — | Upgrade thunderbirdUpgrade firefox | Mar 26, 2021 | Mar 23, 2021 |
| Redhat_linux | — | Upgrade thunderbird-debugsourceUpgrade thunderbird-debuginfoUpgrade firefoxUpgrade firefox-debuginfoUpgrade firefox-debugsourceNo solution existsUpgrade thunderbird | Mar 26, 2021 | Mar 25, 2021 |
| Suse | — | Upgrade mozilla-nspr-32bitUpgrade mozillafirefox-branding-sleUpgrade mozillafirefox-buildsymbolsUpgrade MozillaThunderbird-translations-commonUpgrade mozilla-nsprUpgrade MozillaFirefoxUpgrade mozilla-nspr-develUpgrade MozillaThunderbird-translations-otherUpgrade MozillaFirefox-translations-commonUpgrade MozillaThunderbirdUpgrade mozillafirefox-branding-upstreamUpgrade MozillaFirefox-translations-otherUpgrade MozillaFirefox-devel | Mar 31, 2021 | Mar 25, 2021 |
| Ubuntu | — | Upgrade firefoxUpgrade thunderbird | Mar 26, 2021 | Mar 25, 2021 |
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