Description
A vulnerability where a WebExtension can run content scripts in disallowed contexts following navigation or other events. This allows for potential privilege escalation by the WebExtension on sites where content scripts should not be run. This vulnerability affects Firefox ESR < 60.3 and Firefox < 63.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Mozilla | Firefox ESR | unspecified – < 60.3 | 60.3 |
| Mozilla | Firefox | unspecified – < 63 | 63 |
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.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | firefox-esr | 60.3.0esr-1 | — |
| Debian 13 | firefox-esr | 60.3.0esr-1 | — |
| Debian 12 | firefox-esr | 60.3.0esr-1 | — |
| Debian 9 | firefox-esr | 60.3.0esr-1~deb9u1 | DSA-4324-1 |
| Debian 8 | firefox-esr | 60.3.0esr-1~deb8u1 | DLA-1571-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 20.04 LTS | mozjs52 | No fix yet | — |
| Ubuntu 18.04 LTS | firefox | 63.0+build2-0ubuntu0.18.04.2 | USN-3801-1 |
| Ubuntu 18.04 LTS | mozjs38 +1 | No fix yet | — |
| Ubuntu 16.04 LTS | firefox | 63.0+build2-0ubuntu0.16.04.2 | USN-3801-1 |
| Ubuntu 14.04 LTS | firefox | 63.0+build2-0ubuntu0.14.04.2 | USN-3801-1 |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 7 | firefox | 60.3.0-1.el7_5 | RHSA-2018:3005 |
| RHEL 6 | firefox | 60.3.0-1.el6 | RHSA-2018:3006 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 | MozillaFirefox | 60.3.0-3.17.1 | SUSE-SU-2018:3656-1 |
| SLES 12 SP4 | MozillaFirefox | 60.3.0-109.50.2 | SUSE-SU-2018:3749-2 |
| SLES 12 SP3 | MozillaFirefox | 60.3.0-109.50.2 | SUSE-SU-2018:3749-1 |
| SLES 12 SP2 | MozillaFirefox | 60.3.0-109.50.2 | SUSE-SU-2018:3749-1 |
| SLES 12 SP1 | MozillaFirefox | 60.3.0-109.50.2 | SUSE-SU-2018:3749-1 |
Show 7 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 12 | MozillaFirefox | 60.3.0-109.50.2 | SUSE-SU-2018:3749-1 |
| SLES for SAP 12 SP4 | MozillaFirefox | 60.3.0-109.50.2 | SUSE-SU-2018:3749-2 |
| SLES for SAP 12 SP3 | MozillaFirefox | 60.3.0-109.50.2 | SUSE-SU-2018:3749-1 |
| SLES for SAP 12 SP2 | MozillaFirefox | 60.3.0-109.50.2 | SUSE-SU-2018:3749-1 |
| SLES for SAP 12 SP1 | MozillaFirefox | 60.3.0-109.50.2 | SUSE-SU-2018:3749-3 |
| SUSE OpenStack Cloud 7 | MozillaFirefox | 60.3.0-109.50.2 | SUSE-SU-2018:3749-1 |
| SUSE Enterprise Storage 4 | MozillaFirefox | 60.3.0-109.50.2 | SUSE-SU-2018:3749-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | MozillaFirefox | 92.0-1.2 | openSUSE-SU-2024:10600-1 |
| openSUSE Tumbleweed | firefox-esr | 128.5.1-1.1 | openSUSE-SU-2024:14572-1 |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 7 | firefox | 60.3.0-1.0.1.el7_5 | ELSA-2018-3005 |
Advisories 12
- RHSA-2018:3005 Red Hat Security Advisory: firefox security and bug fix update Red Hat Security Advisories (RHSA) · Jun 27, 2026
- RHSA-2018:3006 Red Hat Security Advisory: firefox security update Red Hat Security Advisories (RHSA) · Jun 27, 2026
- USN-3801-1 firefox vulnerabilities Ubuntu Security Notices (USN) · Apr 22, 2026
- DSA-4324-1 firefox-esr - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DLA-1571-1 firefox-esr - security update Debian Security (DSA / DLA) · Mar 9, 2026
- SUSE-SU-2018:3656-1 Security update for MozillaFirefox SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2018:3749-1 Security update for MozillaFirefox SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2024:10600-1 MozillaFirefox-92.0-1.2 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2018:3749-3 Security update for MozillaFirefox SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2024:14572-1 firefox-esr-128.5.1-1.1 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2018:3749-2 Security update for MozillaFirefox SUSE / openSUSE Security Updates · May 2, 2025
- ELSA-2018-3005 Critical: firefox security and bug fix update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · Oct 24, 2018
References
- https://bugzilla.mozilla.org/show_bug.cgi?id=1483602
- DSA-4324 vendor-advisory
- https://www.mozilla.org/security/advisories/mfsa2018-26/
- GLSA-201811-04 vendor-advisory
- https://www.mozilla.org/security/advisories/mfsa2018-27/
- RHSA-2018:3005 vendor-advisory
- 105718 vdb-entry
- RHSA-2018:3006 vendor-advisory
- USN-3801-1 vendor-advisory
- [debian-lts-announce] 20181107 [SECURITY] [DLA 1571-1] firefox-esr security update mailing-list
- 1041944 vdb-entry