If a Blob URL was loaded through some unusual user interaction, it could have been loaded by the System Principal and granted additional privileges that should not be granted to web content. This vulnerability affects Firefox ESR < 78.10, Thunderbird < 78.10, and Firefox < 88.
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Alma_linux | — | Upgrade thunderbirdUpgrade firefox | May 4, 2022 | Jun 24, 2021 |
| Alpine Linux | — | Upgrade librewolfUpgrade firefox-esrUpgrade firefoxUpgrade thunderbird | Aug 22, 2024 | Jun 24, 2021 |
| Amazon Linux Ami 2 | — | Upgrade thunderbirdUpgrade thunderbird-debuginfo | May 26, 2021 | May 26, 2021 |
| Arch Linux | — | Upgrade to the latest version of Arch Linux | Jul 11, 2025 | Jun 24, 2021 |
| Centos_linux | — | Upgrade thunderbirdUpgrade firefoxUpgrade thunderbird-debugsourceUpgrade thunderbird-debuginfoUpgrade firefox-debuginfoUpgrade firefox-debugsource | Jun 1, 2021 | Apr 26, 2021 |
| Debian | — | Upgrade thunderbirdUpgrade firefox-esr | Apr 23, 2021 | Apr 23, 2021 |
| Gentoo Linux | — | Upgrade mail-client/thunderbird-bin.Upgrade www-client/firefox-bin.Upgrade mail-client/thunderbird.Upgrade www-client/firefox. | May 3, 2021 | Apr 30, 2021 |
| Mfsa2021 15 | — | Upgrade to the latest version of Mozilla FirefoxUpgrade to Mozilla Firefox ESR version 78.10 | Apr 20, 2021 | Apr 19, 2021 |
| Mfsa2021 16 | — | Upgrade to the latest version of Mozilla FirefoxUpgrade to Mozilla Firefox version 88.0 | Apr 20, 2021 | Apr 19, 2021 |
| Mozilla Thunderbird | — | Upgrade to Mozilla Thunderbird version 78.10Upgrade to the latest version of Mozilla Thunderbird | Apr 20, 2021 | Apr 19, 2021 |
| Oracle Solaris | — | Upgrade mail/thunderbird to version 78.10.0-11.4.34.0.1.94.3 on Solaris 11.4Upgrade web/data/firefox-bookmarks to version 78.10.0-11.4.34.0.1.94.3 on Solaris 11.4Upgrade web/browser/firefox to version 78.10.0-11.4.34.0.1.94.3 on Solaris 11.4 | Jun 16, 2021 | Jun 16, 2021 |
| Oracle_linux | — | Upgrade thunderbirdUpgrade firefox | Apr 27, 2021 | Apr 19, 2021 |
| Redhat_linux | — | Upgrade thunderbird-debugsourceUpgrade thunderbird-debuginfoUpgrade firefox-debugsourceNo solution existsUpgrade thunderbirdUpgrade firefoxUpgrade firefox-debuginfo | Apr 27, 2021 | Apr 26, 2021 |
| Suse | — | Upgrade MozillaThunderbird-translations-commonUpgrade MozillaFirefoxUpgrade mozillafirefox-branding-upstreamUpgrade mozillafirefox-buildsymbolsUpgrade MozillaThunderbirdUpgrade MozillaFirefox-develUpgrade MozillaFirefox-translations-commonUpgrade MozillaFirefox-translations-otherUpgrade MozillaThunderbird-translations-other | Apr 27, 2021 | Apr 23, 2021 |
| Ubuntu | — | Upgrade firefoxUpgrade thunderbird | Apr 27, 2021 | Apr 27, 2021 |
With curated Threat Intelligence, you can see which vulnerabilities truly put you at risk, prioritize what matters most, and act before attackers do.
Explore Intelligence Hub