The exception page for the HTTPS-Only feature, displayed when a website is opened via HTTP, lacked an anti-clickjacking delay, potentially allowing an attacker to trick a user into granting an exception and loading a webpage over HTTP. This vulnerability was fixed in Firefox 140 and Thunderbird 140.
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| 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 |
| Mozilla Thunderbird | — | Upgrade to Mozilla Thunderbird version 140.0Upgrade to the latest version of Mozilla Thunderbird | Jul 3, 2025 | Jun 24, 2025 |
| Suse | — | Upgrade MozillaFirefox-develUpgrade MozillaFirefox-translations-otherUpgrade pipewireUpgrade xdg-desktop-portal-develUpgrade xdg-desktop-portal-langUpgrade MozillaFirefox-translations-commonUpgrade xdg-desktop-portalUpgrade MozillaThunderbirdUpgrade pipewire-toolsUpgrade MozillaThunderbird-translations-otherUpgrade pipewire-spa-toolsUpgrade pipewire-modules-0_3Upgrade pipewire-langUpgrade gstreamer-plugin-pipewireUpgrade libpipewire-0_3-0Upgrade pipewire-spa-plugins-0_2Upgrade mozillafirefox-branding-upstreamUpgrade MozillaFirefoxUpgrade MozillaThunderbird-translations-commonUpgrade pipewire-modulesUpgrade mozillafirefox-branding-sle | Jul 22, 2025 | Jun 24, 2025 |
| Ubuntu | — | Upgrade thunderbird | Jun 26, 2025 | Jun 24, 2025 |
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