Description
The Web Workers implementation in Mozilla Firefox before 23.0, Firefox ESR 17.x before 17.0.8, Thunderbird before 17.0.8, Thunderbird ESR 17.x before 17.0.8, and SeaMonkey before 2.20 does not properly restrict XMLHttpRequest calls, which allows remote attackers to bypass the Same Origin Policy and conduct cross-site scripting (XSS) attacks via unspecified vectors.
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 7 | icedove | 17.0.8-1~deb7u1 | DSA-2746-1 |
| Debian 7 | iceweasel | 17.0.8esr-1~deb7u1 | DSA-2735-1 |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 6 | firefox | 17.0.8-1.el6_4 | RHSA-2013:1140 |
| RHEL 6 | thunderbird | 17.0.8-5.el6_4 | RHSA-2013:1142 |
| RHEL 6 | xulrunner +1 | 17.0.8-3.el6_4 | RHSA-2013:1140 |
| RHEL 5 | firefox | 17.0.8-1.el5_9 | RHSA-2013:1140 |
| RHEL 5 | xulrunner +1 | 17.0.8-3.el5_9 | RHSA-2013:1140 |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Red Hat Rhel Productivity 5 | thunderbird | 17.0.8-5.el5_9 | RHSA-2013:1142 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | MozillaFirefox | 50.1.0-1.1 | openSUSE-SU-2024:10071-1 |
| openSUSE Tumbleweed | MozillaThunderbird | 45.5.1-1.1 | openSUSE-SU-2024:10230-1 |
| openSUSE Tumbleweed | firefox-esr | 128.5.1-1.1 | openSUSE-SU-2024:14572-1 |
Advisories 7
- RHSA-2013:1140 Red Hat Security Advisory: firefox security update Red Hat Security Advisories (RHSA) · Jun 29, 2026
- RHSA-2013:1142 Red Hat Security Advisory: thunderbird security update Red Hat Security Advisories (RHSA) · Jun 29, 2026
- DSA-2735-1 iceweasel - several Debian Security (DSA / DLA) · Mar 9, 2026
- DSA-2746-1 icedove - several Debian Security (DSA / DLA) · Mar 9, 2026
- openSUSE-SU-2024:10230-1 MozillaThunderbird-45.5.1-1.1 on GA media 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
References
- DSA-2746 vendor-advisory
- https://bugzilla.mozilla.org/show_bug.cgi?id=879787
- 61882 vdb-entry
- DSA-2735 vendor-advisory
- http://www.mozilla.org/security/announce/2013/mfsa2013-73.html
- oval:org.mitre.oval:def:18002 vdb-entry signature