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Some HTML elements, such as <title> and <textarea>, can contain literal angle brackets without treating them as markup. It is possible to pass a literal closing tag to .innerHTML on these elements, and subsequent content after that will be parsed as if it were outside the tag. This can lead to XSS if a site does not filter user input as strictly for these elements as it does for other elements. This vulnerability affects Firefox < 69, Thunderbird < 68.1, Thunderbird < 60.9, Firefox ESR < 60.9, and Firefox ESR < 68.1.
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Alpine Linux | — | Upgrade firefox-esrUpgrade firefox | Nov 8, 2019 | Sep 27, 2019 |
| Amazon Linux Ami 2 | — | Upgrade thunderbird-debuginfoUpgrade thunderbird | Apr 27, 2020 | Sep 27, 2019 |
| Arch Linux | — | Upgrade to the latest version of Arch Linux | Jul 11, 2025 | Sep 27, 2019 |
| Centos_linux | — | Upgrade firefoxUpgrade thunderbird-debugsourceUpgrade thunderbirdUpgrade firefox-debuginfoUpgrade firefox-debugsourceUpgrade thunderbird-debuginfo | Sep 5, 2019 | Sep 4, 2019 |
| Debian | — | Upgrade firefox-esrUpgrade thunderbird | Sep 9, 2019 | Sep 9, 2019 |
| Freebsd | — | Upgrade waterfoxUpgrade linux-firefoxUpgrade seamonkeyUpgrade linux-seamonkeyUpgrade firefox-esrUpgrade firefoxUpgrade libxulUpgrade linux-thunderbirdUpgrade thunderbird | Sep 4, 2019 | Sep 3, 2019 |
| Gentoo Linux | — | Upgrade www-client/firefox-bin.Upgrade www-client/firefox. | Nov 25, 2019 | Sep 27, 2019 |
| Mfsa2019 25 | — | Upgrade to Mozilla Firefox version 69.0Upgrade to the latest version of Mozilla Firefox | Sep 4, 2019 | Sep 3, 2019 |
| Mfsa2019 26 | — | Upgrade to the latest version of Mozilla FirefoxUpgrade to Mozilla Firefox ESR version 68.1 | Sep 4, 2019 | Sep 3, 2019 |
| Mfsa2019 27 | — | Upgrade to Mozilla Firefox ESR version 60.9Upgrade to the latest version of Mozilla Firefox | Sep 4, 2019 | Sep 3, 2019 |
| Mozilla Thunderbird | — | Upgrade to the latest version of Mozilla ThunderbirdUpgrade to Mozilla Thunderbird version 68.1 | Sep 16, 2021 | Sep 27, 2019 |
| Oracle Solaris | — | Upgrade mail/thunderbird to version 60.9.0-11.4.14.0.1.3.0 on Solaris 11.4Upgrade web/data/firefox-bookmarks to version 60.9.0-11.4.14.0.1.2.0 on Solaris 11.4Upgrade web/browser/firefox to version 60.9.0-11.4.14.0.1.2.0 on Solaris 11.4Upgrade mail/thunderbird/plugin/thunderbird-lightning to version 60.9.0-11.4.14.0.1.3.0 on Solaris 11.4 | Oct 16, 2019 | Sep 27, 2019 |
| Oracle_linux | — | Upgrade thunderbirdUpgrade firefox | Sep 11, 2019 | Sep 3, 2019 |
| Redhat_linux | — | Upgrade thunderbird-debugsourceUpgrade thunderbird-debuginfoUpgrade firefox-debuginfoNo solution existsUpgrade firefox-debugsourceUpgrade thunderbirdUpgrade firefox | Sep 5, 2019 | Sep 4, 2019 |
| Suse | — | Upgrade firefox-libgdk_pixbuf-2_0-0Upgrade firefox-gdk-pixbuf-query-loadersUpgrade firefox-libcairo2Upgrade mozilla-nss-32bitUpgrade libfirefox-gio-2_0-0Upgrade mozilla-nss-develUpgrade firefox-gdk-pixbuf-thumbnailerUpgrade firefox-gtk3-toolsUpgrade firefox-gio-branding-upstreamUpgrade libfirefox-gmodule-2_0-0Upgrade MozillaThunderbird-translations-commonUpgrade firefox-gtk3-immodule-ximUpgrade firefox-atk-langUpgrade firefox-libatk-1_0-0Upgrade mozilla-nss-certs-32bitUpgrade libfreebl3-32bitUpgrade firefox-gtk3-immodule-amharicUpgrade firefox-libffi4Upgrade mozillafirefox-branding-upstreamUpgrade firefox-libffi7Upgrade firefox-gdk-pixbuf-langUpgrade MozillaFirefoxUpgrade mozillafirefox-buildsymbolsUpgrade firefox-libcairo-gobject2Upgrade MozillaFirefox-branding-SLEDUpgrade firefox-glib2-toolsUpgrade mozilla-nss-certsUpgrade firefox-libpango-1_0-0Upgrade firefox-gtk3-langUpgrade libfirefox-glib-2_0-0Upgrade libfirefox-gobject-2_0-0Upgrade libsoftokn3-32bitUpgrade libfreebl3Upgrade MozillaFirefox-translations-commonUpgrade MozillaFirefox-develUpgrade mozilla-nsprUpgrade firefox-gtk3-immodule-thaiUpgrade firefox-glib2-langUpgrade firefox-gtk3-dataUpgrade mozillafirefox-branding-sleUpgrade enigmailUpgrade firefox-gtk3-branding-upstreamUpgrade MozillaFirefox-translations-otherUpgrade libsoftokn3Upgrade firefox-gtk3-immodule-vietnameseUpgrade firefox-gtk3-immodule-inuktitutUpgrade mozilla-nssUpgrade firefox-gtk3-immodules-tigrignaUpgrade MozillaThunderbirdUpgrade firefox-gtk3-immodule-multipressUpgrade MozillaThunderbird-translations-otherUpgrade libfirefox-gthread-2_0-0Upgrade mozilla-nss-toolsUpgrade firefox-libharfbuzz0Upgrade MozillaThunderbird-buildsymbolsUpgrade mozilla-nspr-develUpgrade mozilla-nspr-32bitUpgrade firefox-libgtk-3-0 | Sep 18, 2019 | Sep 3, 2019 |
| Ubuntu | — | Upgrade firefoxUpgrade thunderbird | Sep 5, 2019 | Sep 3, 2019 |
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