Vulnerability · Published Apr 29, 2025 · Assigned by mozilla
CVE-2025-4083Process isolation bypass using "javascript:" URI links in cross-origin frames
Critical 9.1
In plain English
A critical-severity security flaw in Firefox from Mozilla. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.5% (higher than 40% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official description
A process isolation vulnerability in Thunderbird stemmed from improper handling of javascript: URIs, which could allow content to execute in the top-level document's process instead of the intended frame, potentially enabling a sandbox escape. This vulnerability was fixed in Firefox 138, Firefox ESR 128.10, Firefox ESR 115.23, Thunderbird 138, and Thunderbird 128.10.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| AlmaLinux:10 | firefox | 128.10.0-1.el10_0 | ALSA-2025:7506 |
| AlmaLinux:8 | firefox | 128.10.0-1.el8_10.alma.1 | ALSA-2025:4458 |
| AlmaLinux:9 | firefox | 128.10.0-1.el9_5.alma.1 | ALSA-2025:4443 |
| AlmaLinux:9 | firefox | 128.10.0-1.el9_6.alma.1 | ALSA-2025:7428 |
| AlmaLinux:9 | firefox-x11 | 128.10.0-1.el9_6.alma.1 | ALSA-2025:7428 |
| AlmaLinux:9 | firefox-x11 | 128.10.0-1.el9_5.alma.1 | ALSA-2025:4443 |
| AlmaLinux:10 | thunderbird | 128.10.0-1.el10_0.alma.1 | ALSA-2025:7507 |
| AlmaLinux:8 | thunderbird | 128.10.0-1.el8_10.alma.1 | ALSA-2025:4797 |
| AlmaLinux:9 | thunderbird | 128.10.0-1.el9_5.alma.1 | ALSA-2025:4460 |
| Debian:12 | firefox-esr | 128.10.0esr-1~deb12u1 | DSA-5910-1 |
| Debian:12 | firefox-esr | 128.10.0esr-1~deb12u1 | DEBIAN-CVE-2025-4083 |
| Debian:13 | firefox-esr | 128.10.0esr-1 | DEBIAN-CVE-2025-4083 |
| Debian:14 | firefox-esr | 128.10.0esr-1 | DEBIAN-CVE-2025-4083 |
| Debian:12 | thunderbird | 1:128.10.0esr-1~deb12u1 | DSA-5912-1 |
| Debian:12 | thunderbird | 1:128.10.0esr-1~deb12u1 | DEBIAN-CVE-2025-4083 |
| Debian:13 | thunderbird | 1:128.10.0esr-1 | DEBIAN-CVE-2025-4083 |
| Debian:14 | thunderbird | 1:128.10.0esr-1 | DEBIAN-CVE-2025-4083 |
| Rocky Linux:8 | firefox | 0:128.10.0-1.el8_10 | RLSA-2025:4458 |
| Rocky Linux:9 | firefox | 0:128.10.0-1.el9_5 | RLSA-2025:4443 |
| Rocky Linux:9 | firefox | 0:128.10.0-1.el9_5 | RLSA-2025:7428 |
| Rocky Linux:8 | thunderbird | 0:128.10.0-1.el8_10 | RLSA-2025:4797 |
| Rocky Linux:9 | thunderbird | 0:128.10.0-1.el9_5 | RLSA-2025:4460 |
| Ubuntu:22.04:LTS | mozjs102 | no fix listed | UBUNTU-CVE-2025-4083 |
| Ubuntu:24.04:LTS | mozjs102 | no fix listed | UBUNTU-CVE-2025-4083 |
| Ubuntu:24.04:LTS | mozjs115 | no fix listed | UBUNTU-CVE-2025-4083 |
| Ubuntu:22.04:LTS | mozjs78 | no fix listed | UBUNTU-CVE-2025-4083 |
| Ubuntu:22.04:LTS | mozjs91 | no fix listed | UBUNTU-CVE-2025-4083 |
| Ubuntu:22.04:LTS | thunderbird | 1:128.12.0+build1-0ubuntu0.22.04.1 | UBUNTU-CVE-2025-4083 |
| Ubuntu:22.04:LTS | thunderbird | 1:128.12.0+build1-0ubuntu0.22.04.1 | USN-7663-1 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Mozilla | Firefox | see references |
| Mozilla | Thunderbird | see references |
Weakness: CWE-653 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
References
- https://bugzilla.mozilla.org/show_bug.cgi?id=1958350
- https://www.mozilla.org/security/advisories/mfsa2025-28/
- https://www.mozilla.org/security/advisories/mfsa2025-29/
- https://www.mozilla.org/security/advisories/mfsa2025-30/
- https://www.mozilla.org/security/advisories/mfsa2025-31/
- https://www.mozilla.org/security/advisories/mfsa2025-32/
- https://lists.debian.org/debian-lts-announce/2025/05/msg00024.html