Description
The Pocket toolbar button, once activated, listens for events fired from it's own pages but does not verify the origin of incoming events. This allows content from other origins to fire events and inject content and commands into the Pocket context. Note: this issue does not affect users with e10s enabled. This vulnerability affects Firefox ESR < 45.6 and Firefox < 50.1.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Mozilla | Firefox ESR | unspecified – < 45.6 | 45.6 |
| Mozilla | Firefox | unspecified – < 50.1 | 50.1 |
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 | 45.6.0esr-1 | — |
| Debian 13 | firefox-esr | 45.6.0esr-1 | — |
| Debian 12 | firefox-esr | 45.6.0esr-1 | — |
| Debian 8 | firefox-esr | 45.6.0esr-1~deb8u1 | DSA-3734-1 |
| Debian 7 | firefox-esr | 45.6.0esr-1~deb7u1 | DLA-743-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 16.04 LTS | firefox | 50.1.0+build2-0ubuntu0.16.04.1 | USN-3155-1 |
| Ubuntu 14.04 LTS | firefox | 50.1.0+build2-0ubuntu0.14.04.1 | USN-3155-1 |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 7 | firefox +1 | 45.6.0-1.el7_3 | RHSA-2016:2973, RHSA-2016:2946 |
| RHEL 6 | firefox +1 | 45.6.0-1.el6_8 | RHSA-2016:2973, RHSA-2016:2946 |
| RHEL 5 | firefox +1 | 45.6.0-1.el5_11 | RHSA-2016:2973, RHSA-2016:2946 |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Red Hat Rhel Productivity 5 | thunderbird | 45.6.0-1.el5_11 | RHSA-2016:2973 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 12 SP2 | MozillaFirefox | 45.6.0esr-96.1 | SUSE-SU-2016:3222-1 |
| SLES 12 SP1 | MozillaFirefox | 45.6.0esr-96.1 | SUSE-SU-2016:3222-1 |
| SLES 12 | MozillaFirefox | 45.6.0esr-96.1 | SUSE-SU-2016:3222-1 |
| SLES 11 SP4 | MozillaFirefox | 45.6.0esr-62.1 | SUSE-SU-2016:3210-1 |
| SLES 11 SP3 | MozillaFirefox | 45.6.0esr-62.1 | SUSE-SU-2016:3210-1 |
Show 9 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 11 SP2 | MozillaFirefox | 45.6.0esr-66.1 | SUSE-SU-2016:3223-1 |
| SLES for SAP 12 SP2 | MozillaFirefox | 45.6.0esr-96.1 | SUSE-SU-2016:3222-1 |
| SLES for SAP 12 SP1 | MozillaFirefox | 45.6.0esr-96.1 | SUSE-SU-2016:3222-1 |
| SLES for SAP 12 | MozillaFirefox | 45.6.0esr-96.1 | SUSE-SU-2016:3222-1 |
| SLES for SAP 11 SP4 | MozillaFirefox | 45.6.0esr-62.1 | SUSE-SU-2016:3210-1 |
| SUSE OpenStack Cloud 5 | MozillaFirefox | 45.6.0esr-62.1 | SUSE-SU-2016:3210-1 |
| SUSE Manager Proxy 2.1 | MozillaFirefox | 45.6.0esr-62.1 | SUSE-SU-2016:3210-1 |
| SUSE Manager 2.1 | MozillaFirefox | 45.6.0esr-62.1 | SUSE-SU-2016:3210-1 |
| SUSE Linux Enterprise Point of Sale 11 SP3 | MozillaFirefox | 45.6.0esr-62.1 | SUSE-SU-2016:3210-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | MozillaFirefox | 50.1.0-1.1 | openSUSE-SU-2024:10071-1 |
| openSUSE Tumbleweed | firefox-esr | 128.5.1-1.1 | openSUSE-SU-2024:14572-1 |
Alpine
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.4 | firefox-esr | 45.6.0 | — |
Advisories 10
- RHSA-2016:2973 Red Hat Security Advisory: thunderbird security update Red Hat Security Advisories (RHSA) · Jun 26, 2026
- RHSA-2016:2946 Red Hat Security Advisory: firefox security update Red Hat Security Advisories (RHSA) · Jun 26, 2026
- USN-3155-1 firefox vulnerabilities Ubuntu Security Notices (USN) · Apr 22, 2026
- DSA-3734-1 firefox-esr - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DLA-743-1 firefox-esr - security update Debian Security (DSA / DLA) · Mar 9, 2026
- SUSE-SU-2016:3210-1 Security update for MozillaFirefox SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2016:3222-1 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
- openSUSE-SU-2024:10071-1 MozillaFirefox-50.1.0-1.1 on GA media SUSE / openSUSE Security Updates · May 7, 2025
- SUSE-SU-2016:3223-1 Security update for MozillaFirefox SUSE / openSUSE Security Updates · May 2, 2025
References
- https://www.mozilla.org/security/advisories/mfsa2016-94/
- https://www.mozilla.org/security/advisories/mfsa2016-95/
- https://bugzilla.mozilla.org/show_bug.cgi?id=1320039
- 94885 vdb-entry
- 1037461 vdb-entry
- GLSA-201701-15 vendor-advisory
- RHSA-2016:2973 vendor-advisory
- RHSA-2016:2946 vendor-advisory