Input validation error in Mozilla products - CVE-2025-6429

Vulnerability identifier: #VU111888

CSH Severity: Low

CVSS v4: 2.1 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N]

CVE-ID: CVE-2025-6429

CWE-ID: CWE-20

Exploitation vector: Remote access

Exploit availability: No public exploit available

The vulnerability allows a remote attacker to bypass implemented security restrictions.

The vulnerability exists due to incorrect parsing of embedded URLs that led to URLs being rewritten to the youtube.com domain. A remote attacker can use a specially crafted embed tag to bypass website security checks that restricted which domains users were allowed to embed.

Firefox for Android
Firefox ESR
Mozilla Firefox
Debian Linux
SUSE Linux Enterprise Server 15 SP5
SUSE Linux Enterprise Server 15 SP4
SUSE Linux Enterprise Server 15 SP3
SUSE Linux Enterprise Server for SAP Applications 15
SUSE Linux Enterprise Server 15
SUSE Linux Enterprise High Performance Computing LTSS 15
SUSE Linux Enterprise High Performance Computing 15
SUSE Linux Enterprise High Performance Computing ESPOS 15
SUSE Linux Enterprise Workstation Extension 15
SUSE Linux Enterprise Desktop 15
SUSE Linux Enterprise Real Time 15
Anolis OS
SUSE Enterprise Storage
Red Hat Enterprise Linux for Power, little endian
Red Hat Enterprise Linux for x86_64
Red Hat Enterprise Linux for ARM 64
Red Hat Enterprise Linux for IBM z Systems
Red Hat Enterprise Linux Server - AUS
Red Hat Enterprise Linux Server - TUS
Red Hat Enterprise Linux for IBM z Systems - Extended Update Support
Red Hat Enterprise Linux for x86_64 - Extended Update Support
Red Hat Enterprise Linux for ARM 64 - Extended Update Support
Red Hat Enterprise Linux for Power, little endian - Extended Update Support
SUSE Package Hub 15
Desktop Applications Module
openSUSE Leap
openEuler
Ubuntu
Fedora
Red Hat Enterprise Linux Server for Power LE - Update Services for SAP Solutions
pipewire-libpulse-0_3
pipewire-debugsource
pipewire-libpulse-0_3-debuginfo
pipewire-debuginfo
pipewire-libjack-0_3-debuginfo
libpipewire-0_3-0-64bit
pipewire-libjack-0_3-32bit-debuginfo
pipewire-alsa
gstreamer-plugin-pipewire-debuginfo
pipewire-modules
pipewire-spa-plugins-0_2
pipewire-lang
pipewire-tools
pipewire-pulseaudio
libpipewire-0_3-0-debuginfo
pipewire-libjack-0_3-64bit-debuginfo
gstreamer-plugin-pipewire
pipewire-libjack-0_3
pipewire-modules-64bit-debuginfo
pipewire-libjack-0_3-32bit
pipewire-devel
pipewire-spa-plugins-0_2-32bit
pipewire-spa-tools-debuginfo
pipewire-modules-debuginfo
pipewire-modules-32bit
pipewire-tools-debuginfo
libpipewire-0_3-0-32bit-debuginfo
pipewire-doc
libpipewire-0_3-0
pipewire-modules-32bit-debuginfo
pipewire-pulseaudio-debuginfo
libpipewire-0_3-0-32bit
pipewire-alsa-debuginfo
pipewire-spa-tools
pipewire
pipewire-spa-plugins-0_2-32bit-debuginfo
pipewire-spa-plugins-0_2-debuginfo
libpipewire-0_3-0-64bit-debuginfo
pipewire-libjack-0_3-64bit
pipewire-modules-64bit
pipewire-spa-plugins-0_2-64bit-debuginfo
pipewire-spa-plugins-0_2-64bit
pipewire-modules-0_3-32bit
pipewire-modules-0_3-32bit-debuginfo
pipewire-alsa-32bit
pipewire-modules-0_3
pipewire-alsa-32bit-debuginfo
pipewire-modules-0_3-64bit-debuginfo
pipewire-alsa-64bit-debuginfo
pipewire-modules-0_3-64bit
pipewire-alsa-64bit
pipewire-libjack-0_3-devel
pipewire-modules-0_3-debuginfo
pipewire-module-x11-0_3
pipewire-module-x11-0_3-debuginfo
xdg-desktop-portal-lang
xdg-desktop-portal
xdg-desktop-portal-debuginfo
xdg-desktop-portal-devel
xdg-desktop-portal-debugsource
thunderbird (Ubuntu package)
firefox-esr (Debian package)
thunderbird (Debian package)
thunderbird-debugsource
firefox
firefox-debuginfo
thunderbird-debuginfo
thunderbird
thunderbird-librnp-rnp
thunderbird-wayland
firefox-debugsource
firefox (Red Hat package)
thunderbird (Red Hat package)
MozillaThunderbird
MozillaThunderbird-translations-common
MozillaThunderbird-translations-other
MozillaThunderbird-debugsource
MozillaThunderbird-debuginfo
MozillaFirefox-translations-common
MozillaFirefox-debugsource
MozillaFirefox-debuginfo
MozillaFirefox-branding-upstream
MozillaFirefox-translations-other
MozillaFirefox
MozillaFirefox-devel
MozillaFirefox-branding-SLE
Mozilla Thunderbird

Install updates from vendor's website.

Firefox for Android - update to 140.0
Firefox ESR - update to 128.12.0
Mozilla Firefox - update to 140.0
Mozilla Thunderbird - addressed in versions 128.12, 140.0
pipewire-libpulse-0_3 - update to 0.3.6-150200.3.11.1
pipewire-debugsource - addressed in versions 0.3.6-150200.3.11.1, 0.3.24-150300.4.8.1, 0.3.49-150400.3.7.1, 0.3.64-150500.3.7.2
pipewire-libpulse-0_3-debuginfo - update to 0.3.6-150200.3.11.1
pipewire-debuginfo - addressed in versions 0.3.6-150200.3.11.1, 0.3.24-150300.4.8.1, 0.3.49-150400.3.7.1, 0.3.64-150500.3.7.2
pipewire-libjack-0_3-debuginfo - addressed in versions 0.3.24-150300.4.8.1, 0.3.49-150400.3.7.1, 0.3.64-150500.3.7.2
libpipewire-0_3-0-64bit - addressed in versions 0.3.24-150300.4.8.1, 0.3.49-150400.3.7.1, 0.3.64-150500.3.7.2
pipewire-libjack-0_3-32bit-debuginfo - addressed in versions 0.3.24-150300.4.8.1, 0.3.49-150400.3.7.1, 0.3.64-150500.3.7.2
pipewire-alsa - addressed in versions 0.3.24-150300.4.8.1, 0.3.49-150400.3.7.1, 0.3.64-150500.3.7.2
gstreamer-plugin-pipewire-debuginfo - addressed in versions 0.3.24-150300.4.8.1, 0.3.49-150400.3.7.1, 0.3.64-150500.3.7.2
pipewire-modules - update to 0.3.24-150300.4.8.1
pipewire-spa-plugins-0_2 - addressed in versions 0.3.24-150300.4.8.1, 0.3.49-150400.3.7.1, 0.3.64-150500.3.7.2
pipewire-lang - addressed in versions 0.3.24-150300.4.8.1, 0.3.49-150400.3.7.1, 0.3.64-150500.3.7.2
pipewire-tools - addressed in versions 0.3.24-150300.4.8.1, 0.3.49-150400.3.7.1, 0.3.64-150500.3.7.2
pipewire-pulseaudio - addressed in versions 0.3.24-150300.4.8.1, 0.3.49-150400.3.7.1, 0.3.64-150500.3.7.2
libpipewire-0_3-0-debuginfo - addressed in versions 0.3.24-150300.4.8.1, 0.3.49-150400.3.7.1, 0.3.64-150500.3.7.2
pipewire-libjack-0_3-64bit-debuginfo - addressed in versions 0.3.24-150300.4.8.1, 0.3.49-150400.3.7.1, 0.3.64-150500.3.7.2
gstreamer-plugin-pipewire - addressed in versions 0.3.24-150300.4.8.1, 0.3.49-150400.3.7.1, 0.3.64-150500.3.7.2
pipewire-libjack-0_3 - addressed in versions 0.3.24-150300.4.8.1, 0.3.49-150400.3.7.1, 0.3.64-150500.3.7.2
pipewire-modules-64bit-debuginfo - update to 0.3.24-150300.4.8.1
pipewire-libjack-0_3-32bit - addressed in versions 0.3.24-150300.4.8.1, 0.3.49-150400.3.7.1, 0.3.64-150500.3.7.2
pipewire-devel - addressed in versions 0.3.24-150300.4.8.1, 0.3.49-150400.3.7.1, 0.3.64-150500.3.7.2
pipewire-spa-plugins-0_2-32bit - addressed in versions 0.3.24-150300.4.8.1, 0.3.49-150400.3.7.1, 0.3.64-150500.3.7.2
pipewire-spa-tools-debuginfo - addressed in versions 0.3.24-150300.4.8.1, 0.3.49-150400.3.7.1, 0.3.64-150500.3.7.2
pipewire-modules-debuginfo - update to 0.3.24-150300.4.8.1
pipewire-modules-32bit - update to 0.3.24-150300.4.8.1
pipewire-tools-debuginfo - addressed in versions 0.3.24-150300.4.8.1, 0.3.49-150400.3.7.1, 0.3.64-150500.3.7.2
libpipewire-0_3-0-32bit-debuginfo - addressed in versions 0.3.24-150300.4.8.1, 0.3.49-150400.3.7.1, 0.3.64-150500.3.7.2
pipewire-doc - addressed in versions 0.3.24-150300.4.8.1, 0.3.49-150400.3.7.1, 0.3.64-150500.3.7.2
libpipewire-0_3-0 - addressed in versions 0.3.24-150300.4.8.1, 0.3.49-150400.3.7.1, 0.3.64-150500.3.7.2
pipewire-modules-32bit-debuginfo - update to 0.3.24-150300.4.8.1
pipewire-pulseaudio-debuginfo - addressed in versions 0.3.24-150300.4.8.1, 0.3.49-150400.3.7.1, 0.3.64-150500.3.7.2
libpipewire-0_3-0-32bit - addressed in versions 0.3.24-150300.4.8.1, 0.3.49-150400.3.7.1, 0.3.64-150500.3.7.2
pipewire-alsa-debuginfo - addressed in versions 0.3.24-150300.4.8.1, 0.3.49-150400.3.7.1, 0.3.64-150500.3.7.2
pipewire-spa-tools - addressed in versions 0.3.24-150300.4.8.1, 0.3.49-150400.3.7.1, 0.3.64-150500.3.7.2
pipewire - addressed in versions 0.3.24-150300.4.8.1, 0.3.49-150400.3.7.1, 0.3.64-150500.3.7.2
pipewire-spa-plugins-0_2-32bit-debuginfo - addressed in versions 0.3.24-150300.4.8.1, 0.3.49-150400.3.7.1, 0.3.64-150500.3.7.2
pipewire-spa-plugins-0_2-debuginfo - addressed in versions 0.3.24-150300.4.8.1, 0.3.49-150400.3.7.1, 0.3.64-150500.3.7.2
libpipewire-0_3-0-64bit-debuginfo - addressed in versions 0.3.24-150300.4.8.1, 0.3.49-150400.3.7.1, 0.3.64-150500.3.7.2
pipewire-libjack-0_3-64bit - addressed in versions 0.3.24-150300.4.8.1, 0.3.49-150400.3.7.1, 0.3.64-150500.3.7.2
pipewire-modules-64bit - update to 0.3.24-150300.4.8.1
pipewire-spa-plugins-0_2-64bit-debuginfo - addressed in versions 0.3.24-150300.4.8.1, 0.3.49-150400.3.7.1, 0.3.64-150500.3.7.2
pipewire-spa-plugins-0_2-64bit - addressed in versions 0.3.24-150300.4.8.1, 0.3.49-150400.3.7.1, 0.3.64-150500.3.7.2
pipewire-modules-0_3-32bit - addressed in versions 0.3.49-150400.3.7.1, 0.3.64-150500.3.7.2
pipewire-modules-0_3-32bit-debuginfo - addressed in versions 0.3.49-150400.3.7.1, 0.3.64-150500.3.7.2
pipewire-alsa-32bit - addressed in versions 0.3.49-150400.3.7.1, 0.3.64-150500.3.7.2
pipewire-modules-0_3 - addressed in versions 0.3.49-150400.3.7.1, 0.3.64-150500.3.7.2
pipewire-alsa-32bit-debuginfo - addressed in versions 0.3.49-150400.3.7.1, 0.3.64-150500.3.7.2
pipewire-modules-0_3-64bit-debuginfo - addressed in versions 0.3.49-150400.3.7.1, 0.3.64-150500.3.7.2
pipewire-alsa-64bit-debuginfo - addressed in versions 0.3.49-150400.3.7.1, 0.3.64-150500.3.7.2
pipewire-modules-0_3-64bit - addressed in versions 0.3.49-150400.3.7.1, 0.3.64-150500.3.7.2
pipewire-alsa-64bit - addressed in versions 0.3.49-150400.3.7.1, 0.3.64-150500.3.7.2
pipewire-libjack-0_3-devel - addressed in versions 0.3.49-150400.3.7.1, 0.3.64-150500.3.7.2
pipewire-modules-0_3-debuginfo - addressed in versions 0.3.49-150400.3.7.1, 0.3.64-150500.3.7.2
pipewire-module-x11-0_3 - update to 0.3.64-150500.3.7.2
pipewire-module-x11-0_3-debuginfo - update to 0.3.64-150500.3.7.2
xdg-desktop-portal-lang - addressed in versions 1.8.0-150200.5.8.1, 1.10.1-150400.3.8.1, 1.16.0-150400.3.8.1, 1.16.0-150500.3.8.1
xdg-desktop-portal - addressed in versions 1.8.0-150200.5.8.1, 1.10.1-150400.3.8.1, 1.16.0-150400.3.8.1, 1.16.0-150500.3.8.1
xdg-desktop-portal-debuginfo - addressed in versions 1.8.0-150200.5.8.1, 1.10.1-150400.3.8.1, 1.16.0-150400.3.8.1, 1.16.0-150500.3.8.1
xdg-desktop-portal-devel - addressed in versions 1.8.0-150200.5.8.1, 1.10.1-150400.3.8.1, 1.16.0-150400.3.8.1, 1.16.0-150500.3.8.1
xdg-desktop-portal-debugsource - addressed in versions 1.8.0-150200.5.8.1, 1.10.1-150400.3.8.1, 1.16.0-150400.3.8.1, 1.16.0-150500.3.8.1
thunderbird (Ubuntu package) - update to 1:128.12.0+build1-0ubuntu0.22.04.1
firefox-esr (Debian package) - update to 128.12.0esr-1~deb12u1
thunderbird (Debian package) - update to 1:128.12.0esr-1~deb12u1
thunderbird-debugsource - update to 128.12.0-1
firefox - update to 128.12.0-1
firefox-debuginfo - update to 128.12.0-1
thunderbird-debuginfo - update to 128.12.0-1
thunderbird - update to 128.12.0-1
thunderbird-librnp-rnp - update to 128.12.0-1
thunderbird-wayland - update to 128.12.0-1
firefox-debugsource - update to 128.12.0-1
firefox (Red Hat package) - addressed in versions 128.12.0-1.el7_9, 128.12.0-1.el8_2, 128.12.0-1.el8_4, 128.12.0-1.el8_6, 128.12.0-1.el8_8, 128.12.0-1.el8_10, 128.12.0-1.el9_0, 128.12.0-1.el9_2, 128.12.0-1.el9_4, 128.12.0-1.el9_6, 128.12.0-1.el10_0
thunderbird (Red Hat package) - update to 128.12.0-1.el8_10
thunderbird - addressed in versions 128.12.0-1.fc41, 128.12.0-1.fc42
firefox - addressed in versions 128.12.0-1.0.1, 128.12.0-1.0.2
thunderbird - update to 128.12.0-1.0.1
firefox - addressed in versions 140.0-1.fc41, 140.0-1.fc42
MozillaThunderbird - update to 140.1.0-150200.8.230.1
MozillaThunderbird-translations-common - update to 140.1.0-150200.8.230.1
MozillaThunderbird-translations-other - update to 140.1.0-150200.8.230.1
MozillaThunderbird-debugsource - update to 140.1.0-150200.8.230.1
MozillaThunderbird-debuginfo - update to 140.1.0-150200.8.230.1
MozillaFirefox-translations-common - update to 140.1.0-150200.152.193.1
MozillaFirefox-debugsource - update to 140.1.0-150200.152.193.1
MozillaFirefox-debuginfo - update to 140.1.0-150200.152.193.1
MozillaFirefox-branding-upstream - update to 140.1.0-150200.152.193.1
MozillaFirefox-translations-other - update to 140.1.0-150200.152.193.1
MozillaFirefox - update to 140.1.0-150200.152.193.1
MozillaFirefox-devel - update to 140.1.0-150200.152.193.1
MozillaFirefox-branding-SLE - update to 140-150200.9.21.1

• https://www.mozilla.org/en-US/security/advisories/mfsa2025-53/
• https://bugzilla.mozilla.org/show_bug.cgi?id=1970658
• https://www.mozilla.org/en-US/security/advisories/mfsa2025-51/

• Multiple vulnerabilities in Mozilla Firefox
• Fedora 41 update for firefox
• Fedora 42 update for firefox
• Debian update for firefox-esr
• Red Hat Enterprise Linux 9 update for firefox
• Red Hat Enterprise Linux 10 update for firefox
• Red Hat Enterprise Linux 8 update for firefox
• Red Hat Enterprise Linux 7 Extended Lifecycle Support update for firefox
• Red Hat Enterprise Linux 8 update for firefox
• Red Hat Enterprise Linux 8 update for firefox
• Red Hat Enterprise Linux 8 update for firefox
• Red Hat Enterprise Linux 8 update for firefox
• Red Hat Enterprise Linux 9 update for firefox
• Red Hat Enterprise Linux 9 update for firefox
• Red Hat Enterprise Linux 9 update for firefox
• Multiple vulnerabilities in Mozilla Thunderbird 128.x
• Multiple vulnerabilities in Thunderbird
• Anolis OS update for thunderbird
• Anolis OS update for firefox
• openEuler 24.03 LTS SP1 update for firefox
• openEuler 24.03 LTS update for firefox
• openEuler 22.03 LTS SP4 update for firefox
• openEuler 22.03 LTS SP3 update for firefox
• Debian update for thunderbird
• Red Hat Enterprise Linux 8 update for thunderbird
• Fedora 42 update for thunderbird
• Fedora 41 update for thunderbird
• openEuler 24.03 LTS SP2 update for firefox
• Ubuntu update for thunderbird
• openEuler 24.03 LTS SP2 update for thunderbird
• SUSE update for MozillaFirefox, MozillaFirefox-branding-SLE
• SUSE update for MozillaThunderbird
• Anolis OS update for firefox