Description
Multiple cross-site scripting (XSS) vulnerabilities in the rendering engine in Mozilla Firefox before 3.5.16 and 3.6.x before 3.6.13, and SeaMonkey before 2.0.11, allow remote attackers to inject arbitrary web script or HTML via (1) x-mac-arabic, (2) x-mac-farsi, or (3) x-mac-hebrew characters that may be converted to angle brackets during rendering.
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 5.0 | xulrunner | 1.9.0.19-7 | DSA-2132-1 |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 6 | firefox | 3.6.13-2.el6_0 | RHSA-2010:0966 |
| RHEL 6 | xulrunner +1 | 1.9.2.13-3.el6_0 | RHSA-2010:0966 |
| RHEL 5 | firefox | 3.6.13-2.el5 | RHSA-2010:0966 |
| RHEL 5 | xulrunner +1 | 1.9.2.13-3.el5 | RHSA-2010:0966 |
| RHEL 4 | firefox | 3.6.13-3.el4 | RHSA-2010:0966 |
Public exploits
Exploit or proof-of-concept code for this vulnerability is publicly available, which lowers the bar for attackers. Treat it as a reason to patch sooner.
Exploit-DB 1
- Mozilla Firefox/Thunderbird/SeaMonkey - Multiple HTML Injection Vulnerabilities EDB-35095 · remote · Dec 9, 2010 · verified
Sources: PoC-in-GitHub, Metasploit Framework, Exploit-DB — updated daily. Only links are listed; no exploit code is hosted here.
Advisories 2
- RHSA-2010:0966 Red Hat Security Advisory: firefox security update Red Hat Security Advisories (RHSA) · Jun 28, 2026
- DSA-2132-1 xulrunner - several vulnerabilities Debian Security (DSA / DLA) · Mar 9, 2026
References
- 45353 vdb-entry
- SUSE-SA:2011:003 vendor-advisory
- FEDORA-2010-18775 vendor-advisory
- MDVSA-2010:251 vendor-advisory
- https://bugzilla.mozilla.org/show_bug.cgi?id=601429
- http://support.avaya.com/css/P8/documents/100124650
- RHSA-2010:0966 vendor-advisory
- USN-1019-1 vendor-advisory
- 42818 third-party-advisory
- oval:org.mitre.oval:def:12348 vdb-entry signature
- DSA-2132 vendor-advisory
- http://www.mozilla.org/security/announce/2010/mfsa2010-84.html
- FEDORA-2010-18920 vendor-advisory
- ADV-2011-0030 vdb-entry
- FEDORA-2010-18890 vendor-advisory
- 1024851 vdb-entry
- 42716 third-party-advisory
- FEDORA-2010-18773 vendor-advisory