Firefox could have incorrectly parsed a URL and rewritten it to the youtube.com domain when parsing the URL specified in an `embed` tag. This could have bypassed website security checks that restricted which domains users were allowed to embed. This vulnerability was fixed in Firefox 140, Firefox ESR 128.12, Thunderbird 140, and Thunderbird 128.12.
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 |
|---|---|---|---|---|
| Alma_linux | — | Upgrade thunderbirdUpgrade firefoxUpgrade firefox-x11 | Jul 2, 2025 | Jun 24, 2025 |
| Amazon Linux Ami 2 | — | Upgrade firefox-debuginfoUpgrade firefox | May 20, 2026 | May 20, 2026 |
| Amazon_linux_2023 | — | Upgrade firefox-debuginfoUpgrade firefox-debugsourceUpgrade firefox | Jul 11, 2025 | Jun 24, 2025 |
| Debian | — | Upgrade thunderbirdUpgrade firefox-esr | Jun 26, 2025 | Jun 24, 2025 |
| Freebsd | — | Upgrade firefox | Jul 5, 2025 | Jul 4, 2025 |
| Mfsa2025 51 | — | Upgrade to Mozilla Firefox version 140.0Upgrade to the latest version of Mozilla Firefox | Jun 25, 2025 | Jun 24, 2025 |
| Mfsa2025 53 | — | Upgrade to the latest version of Mozilla FirefoxUpgrade to Mozilla Firefox ESR version 128.12 | Jun 25, 2025 | Jun 24, 2025 |
| Mozilla Thunderbird | — | Upgrade to the latest version of Mozilla ThunderbirdUpgrade to Mozilla Thunderbird version 140.0 | Jul 3, 2025 | Jun 24, 2025 |
| Oracle_linux | — | Upgrade firefox-x11Upgrade firefox | Jul 3, 2025 | Jun 24, 2025 |
| Redhat_linux | — | Upgrade thunderbird-debuginfoUpgrade firefox-x11Upgrade firefox-debuginfoUpgrade thunderbirdNo solution existsUpgrade thunderbird-debugsourceUpgrade firefox-debugsourceUpgrade firefox | Jul 2, 2025 | Jun 24, 2025 |
| Rocky_linux | — | Upgrade thunderbird-debuginfoUpgrade thunderbird-debugsourceUpgrade firefox-debugsourceUpgrade firefox-x11Upgrade firefox-debuginfoUpgrade thunderbirdUpgrade firefox | Feb 5, 2026 | Jul 29, 2025 |
| Suse | — | Upgrade gstreamer-plugin-pipewireUpgrade MozillaFirefox-develUpgrade pipewire-toolsUpgrade pipewire-spa-toolsUpgrade MozillaThunderbird-translations-otherUpgrade pipewireUpgrade mozillafirefox-branding-upstreamUpgrade xdg-desktop-portalUpgrade pipewire-spa-plugins-0_2Upgrade xdg-desktop-portal-develUpgrade pipewire-modules-0_3Upgrade MozillaThunderbirdUpgrade xdg-desktop-portal-langUpgrade pipewire-langUpgrade MozillaFirefoxUpgrade libpipewire-0_3-0Upgrade MozillaFirefox-translations-commonUpgrade pipewire-modulesUpgrade MozillaThunderbird-translations-commonUpgrade mozillafirefox-branding-sleUpgrade MozillaFirefox-translations-other | Jun 27, 2025 | Jun 24, 2025 |
| Ubuntu | — | Upgrade thunderbird | Jun 26, 2025 | Jun 24, 2025 |
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