Input validation error in Firefox ESR - CVE-2025-4084

Vulnerability identifier: #VU108047

CSH Severity: Medium

CVSS v4: 7.5 [CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]

CVE-ID: CVE-2025-4084

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 insufficient escaping of the ampersand character in the "copy as cURL" feature. A remote attacker can trick the victim into copying a specially crafted URL and execute arbitrary commands on the system.

Note, the vulnerability affects Windows installations only.

Firefox ESR
SUSE Linux Enterprise Server 15 SP3
SUSE Linux Enterprise Server 15 SP4
SUSE Linux Enterprise Server 15 SP5
SUSE Linux Enterprise High Performance Computing LTSS 15
SUSE Linux Enterprise High Performance Computing 15
SUSE Linux Enterprise Server 15
SUSE Linux Enterprise Server for SAP Applications 15
SUSE Linux Enterprise High Performance Computing ESPOS 15
SUSE Linux Enterprise Desktop 15
SUSE Linux Enterprise Real Time 15
SUSE Linux Enterprise Workstation Extension 15
SUSE Enterprise Storage
Slackware Linux
SUSE Package Hub 15
Desktop Applications Module
openSUSE Leap
openEuler
Mozilla Thunderbird
mozilla-firefox
mozilla-thunderbird
firefox-debuginfo
firefox-debugsource
firefox
MozillaThunderbird-debuginfo
MozillaThunderbird-translations-common
MozillaThunderbird
MozillaThunderbird-debugsource
MozillaThunderbird-translations-other
MozillaFirefox-translations-common
MozillaFirefox-debuginfo
MozillaFirefox-branding-upstream
MozillaFirefox-translations-other
MozillaFirefox
MozillaFirefox-debugsource
MozillaFirefox-devel
thunderbird
thunderbird-debuginfo
thunderbird-debugsource
thunderbird-librnp-rnp
thunderbird-wayland

Install updates from vendor's website.

Firefox ESR - addressed in versions 115.23.0, 128.10.0
Mozilla Thunderbird - update to 128.10
mozilla-firefox - update to 128.10.0esr
mozilla-thunderbird - update to 128.10.0esr
firefox-debuginfo - update to 128.10.0-1
firefox-debugsource - update to 128.10.0-1
firefox - update to 128.10.0-1
MozillaThunderbird-debuginfo - update to 128.10.0-150200.8.212.1
MozillaThunderbird-translations-common - update to 128.10.0-150200.8.212.1
MozillaThunderbird - update to 128.10.0-150200.8.212.1
MozillaThunderbird-debugsource - update to 128.10.0-150200.8.212.1
MozillaThunderbird-translations-other - update to 128.10.0-150200.8.212.1
MozillaFirefox-translations-common - update to 128.10.0-150200.152.179.1
MozillaFirefox-debuginfo - update to 128.10.0-150200.152.179.1
MozillaFirefox-branding-upstream - update to 128.10.0-150200.152.179.1
MozillaFirefox-translations-other - update to 128.10.0-150200.152.179.1
MozillaFirefox - update to 128.10.0-150200.152.179.1
MozillaFirefox-debugsource - update to 128.10.0-150200.152.179.1
MozillaFirefox-devel - update to 128.10.0-150200.152.179.1
thunderbird - update to 140.4.0-1
thunderbird-debuginfo - update to 140.4.0-1
thunderbird-debugsource - update to 140.4.0-1
thunderbird-librnp-rnp - update to 140.4.0-1
thunderbird-wayland - update to 140.4.0-1

• https://www.mozilla.org/en-US/security/advisories/mfsa2025-30/
• https://www.mozilla.org/en-US/security/advisories/mfsa2025-29/
• https://bugzilla.mozilla.org/buglist.cgi?bug_id=1949994%2C1960198

• Multiple vulnerabilities in Mozilla Firefox
• Multiple vulnerabilities in Mozilla Thunderbird ESR
• Slackware Linux update for mozilla-firefox
• Slackware Linux update for mozilla-thunderbird
• SUSE update for MozillaFirefox
• SUSE update for MozillaThunderbird
• openEuler 22.03 LTS SP4 update for firefox
• openEuler 22.03 LTS SP3 update for firefox
• openEuler 24.03 LTS SP1 update for firefox
• openEuler 24.03 LTS update for firefox
• openEuler 24.03 LTS SP2 update for thunderbird