Input validation error in Mozilla products - CVE-2025-5264

Vulnerability identifier: #VU109858

CSH Severity: Medium

CVSS v4: 7.4 [CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:A/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N]

CVE-ID: CVE-2025-5264

CWE-ID: CWE-20

Exploitation vector: Remote access

Exploit availability: No public exploit available

The vulnerability allows a remote attacker to compromise the affected system.

The vulnerability exists due to insufficient validation of user-supplied input within the "Copy as cURL" feature. A remote attacker can trick the victim into copying a specially crafted URL, trick the victim into using this command and execute arbitrary commands on the system.

Mozilla Firefox
Firefox ESR
Firefox for Android
SUSE Linux Enterprise Server 15 SP5
Debian Linux
SUSE Linux Enterprise Server 15 SP4
SUSE Linux Enterprise Server 12 SP5 LTSS Extended
SUSE Linux Enterprise Server 12 SP5
SUSE Linux Enterprise Server 15 SP3
SUSE Linux Enterprise High Performance Computing 15
SUSE Linux Enterprise Server for SAP Applications 15
SUSE Linux Enterprise High Performance Computing LTSS 15
SUSE Linux Enterprise Server 15
SUSE Linux Enterprise High Performance Computing ESPOS 15
SUSE Linux Enterprise High Performance Computing 12
SUSE Linux Enterprise Server 12
SUSE Linux Enterprise Server for SAP Applications 12
SUSE Linux Enterprise Desktop 15
SUSE Linux Enterprise Real Time 15
SUSE Linux Enterprise Workstation Extension 15
Anolis OS
SUSE Enterprise Storage
Red Hat Enterprise Linux for ARM 64
Red Hat Enterprise Linux for Power, little endian
Red Hat Enterprise Linux for IBM z Systems
Red Hat Enterprise Linux for x86_64
Red Hat Enterprise Linux Server - AUS
Red Hat Enterprise Linux Server - TUS
Red Hat Enterprise Linux for ARM 64 - Extended Update Support
Red Hat Enterprise Linux for x86_64 - Extended Update Support
Red Hat Enterprise Linux for IBM z Systems - Extended Update Support
Red Hat Enterprise Linux for Power, little endian - Extended Update Support
Desktop Applications Module
SUSE Package Hub 15
openSUSE Leap
openEuler
Ubuntu
Red Hat Enterprise Linux Server for Power LE - Update Services for SAP Solutions
firefox-esr (Debian package)
thunderbird (Debian package)
firefox
firefox-debuginfo
firefox-debugsource
firefox (Red Hat package)
thunderbird (Red Hat package)
thunderbird
MozillaFirefox-translations-common
MozillaFirefox-debuginfo
MozillaFirefox
MozillaFirefox-debugsource
MozillaFirefox-devel
MozillaThunderbird-translations-common
MozillaThunderbird-translations-other
MozillaThunderbird-debugsource
MozillaThunderbird
MozillaThunderbird-debuginfo
MozillaFirefox-translations-other
MozillaFirefox-branding-upstream
thunderbird-debuginfo
thunderbird-debugsource
thunderbird-librnp-rnp
thunderbird-wayland
thunderbird (Ubuntu package)
Mozilla Thunderbird

Install updates from vendor's website.

Mozilla Firefox - update to 139.0
Firefox for Android - update to 139.0
Firefox ESR - addressed in versions 115.24.0, 128.11.0
Mozilla Thunderbird - addressed in versions 128.11.0, 139.0
firefox-esr (Debian package) - update to 128.11.0esr-1~deb12u1
thunderbird (Debian package) - update to 1:128.11.0esr-1~deb12u1
firefox - update to 128.11.0-1
firefox-debuginfo - update to 128.11.0-1
firefox-debugsource - update to 128.11.0-1
firefox (Red Hat package) - addressed in versions 128.11.0-1.el8_6, 128.11.0-1.el8_10, 128.11.0-1.el9_6
thunderbird (Red Hat package) - addressed in versions 128.11.0-1.el8_8, 128.11.0-1.el8_10, 128.11.0-1.el9_0, 128.11.0-1.el9_2, 128.11.0-1.el9_4, 128.11.0-1.el10_0
thunderbird - update to 128.11.0-1.0.1
firefox - addressed in versions 128.11.0-1.0.1, 128.11.0-1.0.2
MozillaFirefox-translations-common - addressed in versions 128.11.0-112.262.1, 128.11.0-150200.152.185.1
MozillaFirefox-debuginfo - addressed in versions 128.11.0-112.262.1, 128.11.0-150200.152.185.1
MozillaFirefox - addressed in versions 128.11.0-112.262.1, 128.11.0-150200.152.185.1
MozillaFirefox-debugsource - addressed in versions 128.11.0-112.262.1, 128.11.0-150200.152.185.1
MozillaFirefox-devel - addressed in versions 128.11.0-112.262.1, 128.11.0-150200.152.185.1
MozillaThunderbird-translations-common - update to 128.11.0-150200.8.221.1
MozillaThunderbird-translations-other - update to 128.11.0-150200.8.221.1
MozillaThunderbird-debugsource - update to 128.11.0-150200.8.221.1
MozillaThunderbird - update to 128.11.0-150200.8.221.1
MozillaThunderbird-debuginfo - update to 128.11.0-150200.8.221.1
MozillaFirefox-translations-other - update to 128.11.0-150200.152.185.1
MozillaFirefox-branding-upstream - update to 128.11.0-150200.152.185.1
thunderbird - update to 128.11.1-1
thunderbird-debuginfo - update to 128.11.1-1
thunderbird-debugsource - update to 128.11.1-1
thunderbird-librnp-rnp - update to 128.11.1-1
thunderbird-wayland - update to 128.11.1-1
thunderbird (Ubuntu package) - update to 1:128.12.0+build1-0ubuntu0.22.04.1

• https://www.mozilla.org/en-US/security/advisories/mfsa2025-43/
• https://bugzilla.mozilla.org/show_bug.cgi?id=1950001
• https://www.mozilla.org/en-US/security/advisories/mfsa2025-44/
• https://www.mozilla.org/en-US/security/advisories/mfsa2025-42/

• Multiple vulnerabilities in Mozilla Firefox
• Multiple vulnerabilities in Mozilla Thunderbird
• Multiple vulnerabilities in Mozilla Thunderbird ESR
• Debian update for firefox-esr
• Red Hat Enterprise Linux 9 update for firefox
• Red Hat Enterprise Linux 8 update for firefox
• SUSE update for MozillaFirefox
• Debian update for thunderbird
• SUSE update for MozillaFirefox
• Anolis OS update for firefox
• Red Hat Enterprise Linux 9 update for thunderbird
• Red Hat Enterprise Linux 9 update for thunderbird
• Red Hat Enterprise Linux 10 update for thunderbird
• Red Hat Enterprise Linux 8 update for thunderbird
• Red Hat Enterprise Linux 9 update for thunderbird
• Red Hat Enterprise Linux 8 update for thunderbird
• Anolis OS update for thunderbird
• SUSE update for MozillaThunderbird
• openEuler 24.03 LTS update for firefox
• openEuler 22.03 LTS SP4 update for firefox
• openEuler 22.03 LTS SP3 update for firefox
• openEuler 24.03 LTS SP1 update for firefox
• Red Hat Enterprise Linux 8 update for firefox
• openEuler 24.03 LTS SP2 update for thunderbird
• Ubuntu update for thunderbird
• Anolis OS update for firefox