Description
A lack of in app notification for entering fullscreen mode could have lead to a malicious website spoofing browser chrome.<br>*This bug only affects Firefox Focus. Other versions of Firefox are unaffected.*. This vulnerability affects Firefox < 110 and Firefox ESR < 102.8.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Mozilla | Firefox | unspecified – < 110 | 110 |
| Mozilla | Firefox ESR | unspecified – < 102.8 | 102.8 |
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.
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 9 | firefox +2 | 102.8.0-2.el9_1 | RHSA-2023:0824, RHSA-2023:0810 |
| RHEL 8 | firefox +1 | 102.8.0-2.el8_7 | RHSA-2023:0821, RHSA-2023:0808 |
| RHEL 7 | firefox +1 | 102.8.0-2.el7_9 | RHSA-2023:0817, RHSA-2023:0812 |
Show 7 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 9.0 EUS | firefox +1 | 102.8.0-2.el9_0 | RHSA-2023:0823, RHSA-2023:0809 |
| RHEL 8.6 EUS | firefox +1 | 102.8.0-2.el8_6 | RHSA-2023:0822, RHSA-2023:0807 |
| RHEL 8.4 EUS | firefox +1 | 102.8.0-2.el8_4 | RHSA-2023:0820, RHSA-2023:0805 |
| RHEL 8.2 TUS | firefox +1 | 102.8.0-2.el8_2 | RHSA-2023:0819, RHSA-2023:0811 |
| RHEL 8.2 E4S | firefox +1 | 102.8.0-2.el8_2 | RHSA-2023:0819, RHSA-2023:0811 |
| RHEL 8.2 AUS | firefox +1 | 102.8.0-2.el8_2 | RHSA-2023:0819, RHSA-2023:0811 |
| RHEL 8.1 E4S | firefox +1 | 102.8.0-2.el8_1 | RHSA-2023:0818, RHSA-2023:0806 |
AlmaLinux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| AlmaLinux 9 | firefox +2 | 102.8.0-2.el9_1.alma | ALSA-2023:0824, ALSA-2023:0810 |
| AlmaLinux 8 | firefox +1 | 102.8.0-2.el8_7.alma | ALSA-2023:0821, ALSA-2023:0808 |
Rocky Linux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Rocky Linux 9 | firefox +1 | 102.8.0-2.el9_1 | RLSA-2023:0824, RLSA-2023:0810 |
| Rocky Linux 8 | firefox +1 | 102.8.0-2.el8_7 | RLSA-2023:0821, RLSA-2023:0808 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 SP4 | MozillaFirefox | 102.8.0-150200.152.78.1 | SUSE-SU-2023:0461-1 |
| SLES 15 SP3 | MozillaFirefox | 102.8.0-150200.152.78.1 | SUSE-SU-2023:0461-1 |
| SLES 15 SP2 | MozillaFirefox | 102.8.0-150200.152.78.1 | SUSE-SU-2023:0461-1 |
| SLES 15 SP1 | MozillaFirefox | 102.8.0-150000.150.76.1 | SUSE-SU-2023:0469-1 |
| SLES 12 SP5 | MozillaFirefox | 102.8.0-112.150.1 | SUSE-SU-2023:0466-1 |
Show 15 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 12 SP4 | MozillaFirefox | 102.8.0-112.150.1 | SUSE-SU-2023:0466-1 |
| SLES 12 SP2 | MozillaFirefox | 102.8.0-112.150.1 | SUSE-SU-2023:0466-1 |
| SLES for SAP 15 SP3 | MozillaFirefox | 102.8.0-150200.152.78.1 | SUSE-SU-2023:0461-1 |
| SLES for SAP 15 SP2 | MozillaFirefox | 102.8.0-150200.152.78.1 | SUSE-SU-2023:0461-1 |
| SLES for SAP 15 SP1 | MozillaFirefox | 102.8.0-150000.150.76.1 | SUSE-SU-2023:0469-1 |
| SLES for SAP 12 SP5 | MozillaFirefox | 102.8.0-112.150.1 | SUSE-SU-2023:0466-1 |
| SLES for SAP 12 SP4 | MozillaFirefox | 102.8.0-112.150.1 | SUSE-SU-2023:0466-1 |
| SLE Real Time 15 SP3 | MozillaFirefox | 102.8.0-150200.152.78.1 | SUSE-SU-2023:0461-1 |
| SLE HPC 15 SP3 | MozillaFirefox | 102.8.0-150200.152.78.1 | SUSE-SU-2023:0461-1 |
| SLE HPC 15 SP2 | MozillaFirefox | 102.8.0-150200.152.78.1 | SUSE-SU-2023:0461-1 |
| SLE HPC 15 SP1 | MozillaFirefox | 102.8.0-150000.150.76.1 | SUSE-SU-2023:0469-1 |
| SUSE OpenStack Cloud Crowbar 9 | MozillaFirefox | 102.8.0-112.150.1 | SUSE-SU-2023:0466-1 |
| SUSE OpenStack Cloud 9 | MozillaFirefox | 102.8.0-112.150.1 | SUSE-SU-2023:0466-1 |
| SUSE Enterprise Storage 7.1 | MozillaFirefox | 102.8.0-150200.152.78.1 | SUSE-SU-2023:0461-1 |
| SUSE Enterprise Storage 7 | MozillaFirefox | 102.8.0-150200.152.78.1 | SUSE-SU-2023:0461-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | MozillaFirefox | 110.0.1-1.1 | openSUSE-SU-2024:12753-1 |
| openSUSE Tumbleweed | firefox-esr | 128.5.1-1.1 | openSUSE-SU-2024:14572-1 |
| openSUSE Leap 15.4 | MozillaFirefox | 102.8.0-150200.152.78.1 | SUSE-SU-2023:0461-1 |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 9 | firefox +2 | 102.8.0-2.0.1.el9_1 | ELSA-2023-0824, ELSA-2023-0810 |
| Oracle Linux 8 | firefox +1 | 102.8.0-2.0.1.el8_7 | ELSA-2023-0821, ELSA-2023-0808 |
| Oracle Linux 7 | firefox +1 | 102.8.0-2.0.1.el7_9 | ELSA-2023-0817, ELSA-2023-0812 |
Advisories 37
- ALSA-2023:0824 Important: thunderbird security update AlmaLinux Security Advisories · Oct 29, 2026
- ALSA-2023:0810 Important: firefox security update AlmaLinux Security Advisories · Oct 29, 2026
- ALSA-2023:0808 Important: firefox security update AlmaLinux Security Advisories · Oct 29, 2026
- ALSA-2023:0821 Important: thunderbird security update AlmaLinux Security Advisories · Oct 29, 2026
- RHSA-2023:0817 Red Hat Security Advisory: thunderbird security update Red Hat Security Advisories (RHSA) · Jun 26, 2026
- RHSA-2023:0812 Red Hat Security Advisory: firefox security update Red Hat Security Advisories (RHSA) · Jun 26, 2026
- RLSA-2023:0810 Important: firefox security update Rocky Linux Security Advisories · Feb 5, 2026
- RLSA-2023:0824 Important: thunderbird security update Rocky Linux Security Advisories · Feb 5, 2026
- RLSA-2023:0808 Important: firefox security update Rocky Linux Security Advisories · Feb 4, 2026
- RLSA-2023:0821 Important: thunderbird security update Rocky Linux Security Advisories · Feb 4, 2026
- SUSE-SU-2023:0469-1 Security update for MozillaFirefox SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2023:0461-1 Security update for MozillaFirefox SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2024:12753-1 MozillaFirefox-110.0.1-1.1 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2023:0466-1 Security update for MozillaFirefox SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2024:14572-1 firefox-esr-128.5.1-1.1 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
- RHSA-2023:0823 Red Hat Security Advisory: thunderbird security update Red Hat Security Advisories (RHSA) · Nov 22, 2025
- RHSA-2023:0824 Red Hat Security Advisory: thunderbird security update Red Hat Security Advisories (RHSA) · Nov 22, 2025
- RHSA-2023:0821 Red Hat Security Advisory: thunderbird security update Red Hat Security Advisories (RHSA) · Nov 22, 2025
- RHSA-2023:0822 Red Hat Security Advisory: thunderbird security update Red Hat Security Advisories (RHSA) · Nov 22, 2025
- RHSA-2023:0820 Red Hat Security Advisory: thunderbird security update Red Hat Security Advisories (RHSA) · Nov 22, 2025
- RHSA-2023:0818 Red Hat Security Advisory: thunderbird security update Red Hat Security Advisories (RHSA) · Nov 22, 2025
- RHSA-2023:0819 Red Hat Security Advisory: thunderbird security update Red Hat Security Advisories (RHSA) · Nov 22, 2025
- RHSA-2023:0811 Red Hat Security Advisory: firefox security update Red Hat Security Advisories (RHSA) · Nov 22, 2025
- RHSA-2023:0809 Red Hat Security Advisory: firefox security update Red Hat Security Advisories (RHSA) · Nov 22, 2025
- RHSA-2023:0810 Red Hat Security Advisory: firefox security update Red Hat Security Advisories (RHSA) · Nov 22, 2025
- RHSA-2023:0808 Red Hat Security Advisory: firefox security update Red Hat Security Advisories (RHSA) · Nov 22, 2025
- RHSA-2023:0806 Red Hat Security Advisory: Mozilla Firefox security update Red Hat Security Advisories (RHSA) · Nov 22, 2025
- RHSA-2023:0807 Red Hat Security Advisory: Mozilla Firefox security update Red Hat Security Advisories (RHSA) · Nov 22, 2025
- RHSA-2023:0805 Red Hat Security Advisory: firefox security update Red Hat Security Advisories (RHSA) · Nov 22, 2025
- WID-SEC-2023-1424 Xerox FreeFlow Print Server für Solaris: Mehrere Schwachstellen BSI CERT-Bund (WID) · Oct 6, 2025
- WID-SEC-2023-0385 Mozilla Firefox: Mehrere Schwachstellen ermöglichen Codeausführung BSI CERT-Bund (WID) · Sep 27, 2023
- ELSA-2023-0812 Important: firefox security update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · Feb 21, 2023
- ELSA-2023-0817 Important: thunderbird security update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · Feb 21, 2023
- ELSA-2023-0824 Important: thunderbird security update (Oracle Linux 9) Oracle Linux Security Advisories (ELSA) · Feb 20, 2023
- ELSA-2023-0810 Important: firefox security update (Oracle Linux 9) Oracle Linux Security Advisories (ELSA) · Feb 20, 2023
- ELSA-2023-0808 Important: firefox security update (Oracle Linux 8) Oracle Linux Security Advisories (ELSA) · Feb 20, 2023
- ELSA-2023-0821 Important: thunderbird security update (Oracle Linux 8) Oracle Linux Security Advisories (ELSA) · Feb 20, 2023