Description
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.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Mozilla | Firefox | — | 140 |
| Mozilla | Thunderbird | — | 140 |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 24.04 LTS | mozjs102 +1 | No fix yet | — |
| Ubuntu 22.04 LTS | mozjs78 +2 | No fix yet | — |
| Ubuntu 22.04 LTS | thunderbird | 1:140.7.1+build1-0ubuntu0.22.04.1 | — |
| Ubuntu 20.04 LTS | mozjs52 +1 | No fix yet | — |
| Ubuntu 18.04 LTS | mozjs38 +1 | No fix yet | — |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 SP7 | MozillaFirefox | 140.1.0-150200.152.193.1 | SUSE-SU-2025:02529-1 |
| SLES 15 SP7 | MozillaFirefox-branding-SLE | 140-150200.9.21.1 | SUSE-SU-2025:02529-1 |
| SLES 15 SP7 | MozillaThunderbird | 140.1.0-150200.8.230.1 | SUSE-SU-2025:02546-1 |
| SLES 15 SP7 | pipewire | 0.3.6-150200.3.11.1 | SUSE-SU-2025:02529-1 |
| SLES 15 SP6 | MozillaFirefox | 140.1.0-150200.152.193.1 | SUSE-SU-2025:02529-1 |
| SLES 15 SP6 | MozillaFirefox-branding-SLE | 140-150200.9.21.1 | SUSE-SU-2025:02529-1 |
| SLES 15 SP6 | MozillaThunderbird | 140.1.0-150200.8.230.1 | SUSE-SU-2025:02546-1 |
| SLES 15 SP6 | pipewire | 0.3.6-150200.3.11.1 | SUSE-SU-2025:02529-1 |
| SLES 15 SP5 | MozillaFirefox | 140.1.0-150200.152.193.1 | SUSE-SU-2025:02529-1 |
| SLES 15 SP5 | MozillaFirefox-branding-SLE | 140-150200.9.21.1 | SUSE-SU-2025:02529-1 |
| SLES 15 SP5 | pipewire | 0.3.64-150500.3.7.2 | SUSE-SU-2025:02529-1 |
| SLES 15 SP5 | xdg-desktop-portal | 1.16.0-150500.3.8.1 | SUSE-SU-2025:02529-1 |
| SLES 15 SP4 | MozillaFirefox | 140.1.0-150200.152.193.1 | SUSE-SU-2025:02529-1 |
| SLES 15 SP4 | MozillaFirefox-branding-SLE | 140-150200.9.21.1 | SUSE-SU-2025:02529-1 |
| SLES 15 SP4 | pipewire | 0.3.49-150400.3.7.1 | SUSE-SU-2025:02529-1 |
| SLES 15 SP4 | xdg-desktop-portal | 1.10.1-150400.3.8.1 | SUSE-SU-2025:02529-1 |
| SLES 15 SP3 | MozillaFirefox | 140.1.0-150200.152.193.1 | SUSE-SU-2025:02529-1 |
| SLES 15 SP3 | MozillaFirefox-branding-SLE | 140-150200.9.21.1 | SUSE-SU-2025:02529-1 |
| SLES 15 SP3 | pipewire | 0.3.24-150300.4.8.1 | SUSE-SU-2025:02529-1 |
| SLES 15 SP3 | xdg-desktop-portal | 1.8.0-150200.5.8.1 | SUSE-SU-2025:02529-1 |
Show 8 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 12 SP5 | MozillaFirefox | 140.0-112.270.2 | SUSE-SU-2025:02339-1 |
| SLES 12 SP5 | MozillaFirefox-branding-SLE | 140-35.19.5 | SUSE-SU-2025:02339-1 |
| SLES for SAP 15 SP5 | MozillaFirefox | 140.1.0-150200.152.193.1 | SUSE-SU-2025:02529-1 |
| SLES for SAP 15 SP5 | MozillaFirefox-branding-SLE | 140-150200.9.21.1 | SUSE-SU-2025:02529-1 |
| SLES for SAP 15 SP5 | pipewire | 0.3.64-150500.3.7.2 | SUSE-SU-2025:02529-1 |
| SLES for SAP 15 SP5 | xdg-desktop-portal | 1.16.0-150500.3.8.1 | SUSE-SU-2025:02529-1 |
| SLES for SAP 15 SP4 | MozillaFirefox | 140.1.0-150200.152.193.1 | SUSE-SU-2025:02529-1 |
| SLES for SAP 15 SP4 | MozillaFirefox-branding-SLE | 140-150200.9.21.1 | SUSE-SU-2025:02529-1 |
| SLES for SAP 15 SP4 | pipewire | 0.3.49-150400.3.7.1 | SUSE-SU-2025:02529-1 |
| SLES for SAP 15 SP4 | xdg-desktop-portal | 1.10.1-150400.3.8.1 | SUSE-SU-2025:02529-1 |
| SLES for SAP 15 SP3 | MozillaFirefox | 140.1.0-150200.152.193.1 | SUSE-SU-2025:02529-1 |
| SLES for SAP 15 SP3 | MozillaFirefox-branding-SLE | 140-150200.9.21.1 | SUSE-SU-2025:02529-1 |
| SLES for SAP 15 SP3 | pipewire | 0.3.24-150300.4.8.1 | SUSE-SU-2025:02529-1 |
| SLES for SAP 15 SP3 | xdg-desktop-portal | 1.8.0-150200.5.8.1 | SUSE-SU-2025:02529-1 |
| SLE HPC 15 SP5 | MozillaFirefox | 140.1.0-150200.152.193.1 | SUSE-SU-2025:02529-1 |
| SLE HPC 15 SP5 | MozillaFirefox-branding-SLE | 140-150200.9.21.1 | SUSE-SU-2025:02529-1 |
| SLE HPC 15 SP5 | pipewire | 0.3.64-150500.3.7.2 | SUSE-SU-2025:02529-1 |
| SLE HPC 15 SP5 | xdg-desktop-portal | 1.16.0-150500.3.8.1 | SUSE-SU-2025:02529-1 |
| SLE HPC 15 SP4 | MozillaFirefox | 140.1.0-150200.152.193.1 | SUSE-SU-2025:02529-1 |
| SLE HPC 15 SP4 | MozillaFirefox-branding-SLE | 140-150200.9.21.1 | SUSE-SU-2025:02529-1 |
| SLE HPC 15 SP4 | pipewire | 0.3.49-150400.3.7.1 | SUSE-SU-2025:02529-1 |
| SLE HPC 15 SP4 | xdg-desktop-portal | 1.10.1-150400.3.8.1 | SUSE-SU-2025:02529-1 |
| SLE HPC 15 SP3 | MozillaFirefox | 140.1.0-150200.152.193.1 | SUSE-SU-2025:02529-1 |
| SLE HPC 15 SP3 | MozillaFirefox-branding-SLE | 140-150200.9.21.1 | SUSE-SU-2025:02529-1 |
| SLE HPC 15 SP3 | pipewire | 0.3.24-150300.4.8.1 | SUSE-SU-2025:02529-1 |
| SLE HPC 15 SP3 | xdg-desktop-portal | 1.8.0-150200.5.8.1 | SUSE-SU-2025:02529-1 |
| SUSE Enterprise Storage 7.1 | MozillaFirefox | 140.1.0-150200.152.193.1 | SUSE-SU-2025:02529-1 |
| SUSE Enterprise Storage 7.1 | MozillaFirefox-branding-SLE | 140-150200.9.21.1 | SUSE-SU-2025:02529-1 |
| SUSE Enterprise Storage 7.1 | pipewire | 0.3.24-150300.4.8.1 | SUSE-SU-2025:02529-1 |
| SUSE Enterprise Storage 7.1 | xdg-desktop-portal | 1.8.0-150200.5.8.1 | SUSE-SU-2025:02529-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | MozillaFirefox | 140.0.2-1.1 | openSUSE-SU-2025:15325-1 |
| openSUSE Tumbleweed | firefox-esr +1 | 140.1.0-1.1 | openSUSE-SU-2025:15383-1, openSUSE-SU-2025:15371-1 |
| openSUSE Leap 15.6 | MozillaFirefox | 140.1.0-150200.152.193.1 | SUSE-SU-2025:02529-1 |
| openSUSE Leap 15.6 | MozillaFirefox-branding-SLE | 140-150200.9.21.1 | SUSE-SU-2025:02529-1 |
| openSUSE Leap 15.6 | MozillaThunderbird | 140.1.0-150200.8.230.1 | SUSE-SU-2025:02546-1 |
Wolfi
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Wolfi rolling | firefox | 140-r0 | — |
Advisories 8
- WID-SEC-2025-1395 Mozilla Firefox: Mehrere Schwachstellen BSI CERT-Bund (WID) · Jun 11, 2026
- openSUSE-SU-2025:15383-1 MozillaThunderbird-140.1.0-1.1 on GA media SUSE / openSUSE Security Updates · Mar 23, 2026
- openSUSE-SU-2025:15371-1 firefox-esr-140.1.0-1.1 on GA media SUSE / openSUSE Security Updates · Mar 23, 2026
- openSUSE-SU-2025:15325-1 MozillaFirefox-140.0.2-1.1 on GA media SUSE / openSUSE Security Updates · Mar 23, 2026
- SUSE-SU-2025:02339-1 Security update for MozillaFirefox, MozillaFirefox-branding-SLE SUSE / openSUSE Security Updates · Mar 23, 2026
- SUSE-SU-2025:02529-1 Security update for MozillaFirefox, MozillaFirefox-branding-SLE SUSE / openSUSE Security Updates · Mar 23, 2026
- SUSE-SU-2025:02546-1 Security update for MozillaThunderbird SUSE / openSUSE Security Updates · Feb 4, 2026
- WID-SEC-2025-1850 Xerox FreeFlow Print Server: Mehrere Schwachstellen ermöglichen nicht spezifizierten Angriff BSI CERT-Bund (WID) · Nov 17, 2025