Description
Insufficient escaping in the “Copy as cURL” feature could have been used to trick a user into executing unexpected code on Windows. This did not affect the application when running on other operating systems. This vulnerability was fixed in Firefox 144, Firefox ESR 140.4, Thunderbird 144, and Thunderbird 140.4.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Mozilla | Firefox | — | 140.4 |
| Mozilla | Thunderbird | — | 140.4 |
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 | 140.4.0-150200.152.207.1 | SUSE-SU-2025:4173-1, SUSE-SU-2025:3775-1 |
| SLES 15 SP7 | MozillaThunderbird | 140.4.0-150200.8.242.1 | SUSE-SU-2025:4006-1 |
| SLES 15 SP6 | MozillaFirefox | 140.4.0-150200.152.207.1 | SUSE-SU-2025:4173-1, SUSE-SU-2025:3775-1 |
| SLES 15 SP6 | MozillaThunderbird | 140.4.0-150200.8.242.1 | SUSE-SU-2025:4006-1 |
| SLES 15 SP5 | MozillaFirefox | 140.4.0-150200.152.207.1 | SUSE-SU-2025:4173-1, SUSE-SU-2025:3775-1 |
| SLES 15 SP4 | MozillaFirefox | 140.4.0-150200.152.207.1 | SUSE-SU-2025:4173-1, SUSE-SU-2025:3775-1 |
| SLES 15 SP3 | MozillaFirefox | 140.4.0-150200.152.207.1 | SUSE-SU-2025:4173-1, SUSE-SU-2025:3775-1 |
Show 10 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 12 SP5 | MozillaFirefox | 140.4.0-112.286.1 | SUSE-SU-2025:4174-1, SUSE-SU-2025:3808-1 |
| SLES for SAP 16.0 | MozillaFirefox | 140.5.0-160000.1.1 | SUSE-SU-2025:21021-1 |
| SLES for SAP 15 SP5 | MozillaFirefox | 140.4.0-150200.152.207.1 | SUSE-SU-2025:4173-1, SUSE-SU-2025:3775-1 |
| SLES for SAP 15 SP4 | MozillaFirefox | 140.4.0-150200.152.207.1 | SUSE-SU-2025:4173-1, SUSE-SU-2025:3775-1 |
| SLES for SAP 15 SP3 | MozillaFirefox | 140.4.0-150200.152.207.1 | SUSE-SU-2025:4173-1, SUSE-SU-2025:3775-1 |
| SLES 16.0 | MozillaFirefox | 140.5.0-160000.1.1 | SUSE-SU-2025:21021-1 |
| SLE HPC 15 SP5 | MozillaFirefox | 140.4.0-150200.152.207.1 | SUSE-SU-2025:4173-1, SUSE-SU-2025:3775-1 |
| SLE HPC 15 SP4 | MozillaFirefox | 140.4.0-150200.152.207.1 | SUSE-SU-2025:4173-1, SUSE-SU-2025:3775-1 |
| SLE HPC 15 SP3 | MozillaFirefox | 140.4.0-150200.152.207.1 | SUSE-SU-2025:4173-1, SUSE-SU-2025:3775-1 |
| SUSE Enterprise Storage 7.1 | MozillaFirefox | 140.4.0-150200.152.207.1 | SUSE-SU-2025:4173-1, SUSE-SU-2025:3775-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | MozillaFirefox | 144.0-1.1 | openSUSE-SU-2025:15645-1 |
| openSUSE Tumbleweed | firefox-esr +1 | 140.4.0-1.1 | openSUSE-SU-2025:15646-1, openSUSE-SU-2025:15632-1 |
| openSUSE Leap 16.0 | MozillaFirefox | 140.5.0-160000.1.1 | openSUSE-SU-2025:20065-1 |
| openSUSE Leap 16.0 | MozillaThunderbird | 140.4.0-bp160.1.1 | openSUSE-SU-2025:20026-1 |
| openSUSE Leap 15.6 | MozillaFirefox | 140.4.0-150200.152.207.1 | SUSE-SU-2025:4173-1, SUSE-SU-2025:3775-1 |
| openSUSE Leap 15.6 | MozillaThunderbird | 140.4.0-150200.8.242.1 | SUSE-SU-2025:4006-1 |
Wolfi
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Wolfi rolling | firefox | 140.4-r0 | — |
Advisories 13
- WID-SEC-2025-2275 Mozilla Firefox: Mehrere Schwachstellen BSI CERT-Bund (WID) · Jun 30, 2026
- openSUSE-SU-2025:20065-1 Security update for MozillaFirefox SUSE / openSUSE Security Updates · Mar 23, 2026
- openSUSE-SU-2025:20026-1 Security update for MozillaThunderbird SUSE / openSUSE Security Updates · Mar 23, 2026
- openSUSE-SU-2025:15646-1 MozillaThunderbird-140.4.0-1.1 on GA media SUSE / openSUSE Security Updates · Mar 23, 2026
- openSUSE-SU-2025:15645-1 MozillaFirefox-144.0-1.1 on GA media SUSE / openSUSE Security Updates · Mar 23, 2026
- openSUSE-SU-2025:15632-1 firefox-esr-140.4.0-1.1 on GA media SUSE / openSUSE Security Updates · Mar 23, 2026
- SUSE-SU-2025:4006-1 Security update for MozillaThunderbird SUSE / openSUSE Security Updates · Mar 23, 2026
- SUSE-SU-2025:3808-1 Security update for MozillaFirefox SUSE / openSUSE Security Updates · Mar 23, 2026
- SUSE-SU-2025:21021-1 Security update for MozillaFirefox SUSE / openSUSE Security Updates · Mar 23, 2026
- SUSE-SU-2025:4174-1 Security update for MozillaFirefox SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2025:3775-1 Security update for MozillaFirefox SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2025:4173-1 Security update for MozillaFirefox SUSE / openSUSE Security Updates · Feb 4, 2026
- NCSC-2025-0325 Kwetsbaarheden verholpen in Mozilla Firefox en Thunderbird NCSC-NL (Netherlands) · Oct 20, 2025