The "Forget about this site" feature in the History pane is intended to remove all saved user data that indicates a user has visited a site. This includes removing any HTTP Strict Transport Security (HSTS) settings received from sites that use it. Due to a bug, sites on the pre-load list also have their HSTS setting removed. On the next visit to that site if the user specifies an http: URL rather than secure https: they will not be protected by the pre-loaded HSTS setting. After that visit the site's HSTS setting will be restored. This vulnerability affects Firefox < 69 and Firefox ESR < 68.1.
CVSS Details
- CVSS 3.1 Base Score: 6.5
- CVSS 3.1 Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N)
Covered by Rapid7
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Alpine Linux | — | Upgrade firefox-esr | Nov 8, 2019 | Sep 27, 2019 |
| Arch Linux | — | Upgrade to the latest version of Arch Linux | Jul 11, 2025 | Sep 27, 2019 |
| Centos_linux | — | Upgrade firefoxUpgrade firefox-debugsourceUpgrade firefox-debuginfo | Sep 5, 2019 | Sep 4, 2019 |
| Debian | — | Upgrade firefox-esr | Jul 30, 2024 | Sep 27, 2019 |
| Freebsd | — | Upgrade linux-firefoxUpgrade firefox-esrUpgrade firefoxUpgrade thunderbirdUpgrade seamonkeyUpgrade linux-seamonkeyUpgrade waterfoxUpgrade linux-thunderbirdUpgrade libxul | Sep 4, 2019 | Sep 3, 2019 |
| Mfsa2019 25 | — | Upgrade to Mozilla Firefox version 69.0 | Sep 4, 2019 | Sep 3, 2019 |
| Mfsa2019 26 | — | Upgrade to Mozilla Firefox ESR version 68.1 | Sep 4, 2019 | Sep 3, 2019 |
| Oracle Solaris | — | Upgrade 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 11.4Upgrade web/browser/firefox to version 78.3.0-11.4.27.0.1.82.0 on Solaris 11.4Upgrade mail/thunderbird/plugin/thunderbird-lightning to version 68.12.0-11.4.27.0.1.82.0 on Solaris 11.4 | Jan 19, 2021 | Sep 27, 2019 |
| Oracle_linux | — | Upgrade firefox | Jul 21, 2020 | Sep 3, 2019 |
| Redhat_linux | — | Upgrade firefox-debuginfoUpgrade firefox-debugsourceNo solution existsUpgrade firefox | Sep 5, 2019 | Sep 4, 2019 |
| Suse | — | Upgrade firefox-gtk3-immodule-ximUpgrade mozilla-nss-32bitUpgrade firefox-gtk3-toolsUpgrade mozilla-nssUpgrade firefox-libatk-1_0-0Upgrade libfirefox-glib-2_0-0Upgrade mozilla-nss-certsUpgrade firefox-gdk-pixbuf-langUpgrade firefox-libcairo-gobject2Upgrade firefox-gdk-pixbuf-thumbnailerUpgrade firefox-libgtk-3-0Upgrade firefox-gtk3-langUpgrade mozillafirefoxUpgrade mozilla-nss-develUpgrade mozillafirefox-branding-sledUpgrade libfirefox-gio-2_0-0Upgrade mozillafirefox-develUpgrade mozilla-nss-certs-32bitUpgrade mozillafirefox-buildsymbolsUpgrade libfreebl3Upgrade firefox-atk-langUpgrade libsoftokn3Upgrade mozillafirefox-branding-upstreamUpgrade firefox-libgdk_pixbuf-2_0-0Upgrade libfreebl3-32bitUpgrade mozillafirefox-translations-otherUpgrade firefox-libpango-1_0-0Upgrade firefox-gtk3-immodule-amharicUpgrade firefox-glib2-toolsUpgrade firefox-libcairo2Upgrade firefox-libffi7Upgrade firefox-glib2-langUpgrade mozilla-nsprUpgrade mozillafirefox-branding-sleUpgrade mozilla-nss-toolsUpgrade mozilla-nspr-develUpgrade firefox-gtk3-immodule-multipressUpgrade libfirefox-gobject-2_0-0Upgrade firefox-gdk-pixbuf-query-loadersUpgrade firefox-gio-branding-upstreamUpgrade firefox-libharfbuzz0Upgrade mozillafirefox-translations-commonUpgrade firefox-gtk3-immodule-vietnameseUpgrade firefox-gtk3-branding-upstreamUpgrade libfirefox-gmodule-2_0-0Upgrade firefox-libffi4Upgrade firefox-gtk3-immodules-tigrignaUpgrade firefox-gtk3-immodule-inuktitutUpgrade mozilla-nspr-32bitUpgrade firefox-gtk3-immodule-thaiUpgrade libsoftokn3-32bitUpgrade firefox-gtk3-dataUpgrade libfirefox-gthread-2_0-0 | Oct 8, 2019 | Sep 3, 2019 |
| Ubuntu | — | Upgrade firefox | Sep 5, 2019 | Sep 3, 2019 |
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