CVE-2012-4207
The HZ-GB-2312 character-set implementation in Mozilla Firefox before 17.0, Firefox ESR 10.x...
4.3 MediumFix available
CVE-2012-4207 is a medium vulnerability (CVSS 4.3) in Mozilla Firefox, published November 21, 2012. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 2.78%, the 86th percentile. Fixed in iceweasel 3.5.16-20.
The HZ-GB-2312 character-set implementation in Mozilla Firefox before 17.0, Firefox ESR 10.x before 10.0.11, Thunderbird before 17.0, Thunderbird ESR 10.x before 10.0.11, and SeaMonkey before 2.14 does not properly handle a ~ (tilde) character in proximity to a chunk delimiter, which allows remote attackers to conduct cross-site scripting (XSS) attacks via a crafted document.
Exploit likelihood
2.78%Down 1.2 points since Feb 4, 2022
What each source reports
NVD Score used
The HZ-GB-2312 character-set implementation in Mozilla Firefox before 17.0, Firefox ESR 10.x before 10.0.11, Thunderbird before 17.0, Thunderbird ESR 10.x before 10.0.11, and SeaMonkey before 2.14 does not properly handle a ~ (tilde) character in proximity to a chunk delimiter, which allows remote attackers to conduct cross-site scripting (XSS) attacks via a crafted document.
- Record
CVE-2012-4207- CVSS 2.0
- 4.3 Medium
AV:N/AC:M/Au:N/C:N/I:P/A:N - Weakness
- CWE-79
- Updated
- 2026-11-02
CVE List No score
The HZ-GB-2312 character-set implementation in Mozilla Firefox before 17.0, Firefox ESR 10.x before 10.0.11, Thunderbird before 17.0, Thunderbird ESR 10.x before 10.0.11, and SeaMonkey before 2.14 does not properly handle a ~ (tilde) character in proximity to a chunk delimiter, which allows remote attackers to conduct cross-site scripting (XSS) attacks via a crafted document.
- Record
CVE-2012-4207- Updated
- 2026-11-02
EUVDEUVD-2012-4151 No score
The HZ-GB-2312 character-set implementation in Mozilla Firefox before 17.0, Firefox ESR 10.x before 10.0.11, Thunderbird before 17.0, Thunderbird ESR 10.x before 10.0.11, and SeaMonkey before 2.14 does not properly handle a ~ (tilde) character in proximity to a chunk delimiter, which allows remote attackers to conduct cross-site scripting (XSS) attacks via a crafted document.
- Record
EUVD-2012-4151- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-jprg-6jgr-c6j9 No score
The HZ-GB-2312 character-set implementation in Mozilla Firefox before 17.0, Firefox ESR 10.x...
The HZ-GB-2312 character-set implementation in Mozilla Firefox before 17.0, Firefox ESR 10.x before 10.0.11, Thunderbird before 17.0, Thunderbird ESR 10.x before 10.0.11, and SeaMonkey before 2.14 does not properly handle a ~ (tilde) character in proximity to a chunk delimiter, which allows remote attackers to conduct cross-site scripting (XSS) attacks via a crafted document.
- Record
GHSA-jprg-6jgr-c6j9- Weakness
- CWE-79
- Updated
- 2026-11-02
OSVopenSUSE-SU-2024:10071-1 No score
MozillaFirefox-50.1.0-1.1 on GA media
These are all security issues fixed in the MozillaFirefox-50.1.0-1.1 package on the GA media of openSUSE Tumbleweed.
- Record
openSUSE-SU-2024:10071-1- Updated
- 2026-11-02
OSVopenSUSE-SU-2024:10218-1 No score
seamonkey-2.40-6.1 on GA media
These are all security issues fixed in the seamonkey-2.40-6.1 package on the GA media of openSUSE Tumbleweed.
- Record
openSUSE-SU-2024:10218-1- Updated
- 2026-11-02
OSVopenSUSE-SU-2024:10230-1 No score
MozillaThunderbird-45.5.1-1.1 on GA media
These are all security issues fixed in the MozillaThunderbird-45.5.1-1.1 package on the GA media of openSUSE Tumbleweed.
- Record
openSUSE-SU-2024:10230-1- Updated
- 2026-11-02
OSVopenSUSE-SU-2024:14572-1 No score
firefox-esr-128.5.1-1.1 on GA media
These are all security issues fixed in the firefox-esr-128.5.1-1.1 package on the GA media of openSUSE Tumbleweed.
- Record
openSUSE-SU-2024:14572-1- Updated
- 2026-11-02
Affected products
- mozilla firefox
- mozilla seamonkey
- mozilla thunderbird
- mozilla thunderbird esr
- canonical ubuntu linux
- debian linux
- opensuse
- redhat enterprise linux desktop
- redhat enterprise linux eus
- redhat enterprise linux server
- redhat enterprise linux workstation
- suse linux enterprise desktop
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Affected packages
| Package | Affected | Fixed |
|---|---|---|
iceweaselDebian:6.0 |
before 3.5.16-20, plus listed versions 3.5.16-103.5.16-10~bpo50+13.5.16-113.5.16-11~bpo50+13.5.16-12 Show 17 moreShow less3.5.16-133.5.16-143.5.16-153.5.16-163.5.16-173.5.16-183.5.16-193.5.16-43.5.16-53.5.16-5~bpo50+13.5.16-63.5.16-6~bpo50+13.5.16-73.5.16-7~bpo50+13.5.16-83.5.16-8~bpo50+13.5.16-9 |
3.5.16-20 |
iceapeDebian:6.0 |
before 2.0.11-17, plus listed versions 2.0.11-102.0.11-112.0.11-122.0.11-132.0.11-14 Show 10 moreShow less2.0.11-152.0.11-162.0.11-22.0.11-32.0.11-42.0.11-52.0.11-62.0.11-72.0.11-82.0.11-9 |
2.0.11-17 |
icedoveDebian:6.0 |
before 3.0.11-1+squeeze15, plus listed versions 3.0.11-13.0.11-1+squeeze13.0.11-1+squeeze103.0.11-1+squeeze113.0.11-1+squeeze12 Show 10 moreShow less3.0.11-1+squeeze133.0.11-1+squeeze143.0.11-1+squeeze23.0.11-1+squeeze33.0.11-1+squeeze43.0.11-1+squeeze53.0.11-1+squeeze63.0.11-1+squeeze73.0.11-1+squeeze83.0.11-1+squeeze9 |
3.0.11-1+squeeze15 |
firefoxRed Hat:enterprise_linux:5::client |
before 0:10.0.11-1.el5_8 | 0:10.0.11-1.el5_8 |
firefox-debuginfoRed Hat:enterprise_linux:5::client |
before 0:10.0.11-1.el5_8 | 0:10.0.11-1.el5_8 |
xulrunnerRed Hat:enterprise_linux:5::client |
before 0:10.0.11-1.el5_8 | 0:10.0.11-1.el5_8 |
xulrunner-debuginfoRed Hat:enterprise_linux:5::client |
before 0:10.0.11-1.el5_8 | 0:10.0.11-1.el5_8 |
xulrunnerRed Hat:enterprise_linux:5::client_workstation |
before 0:10.0.11-1.el5_8 | 0:10.0.11-1.el5_8 |
xulrunner-debuginfoRed Hat:enterprise_linux:5::client_workstation |
before 0:10.0.11-1.el5_8 | 0:10.0.11-1.el5_8 |
xulrunner-develRed Hat:enterprise_linux:5::client_workstation |
before 0:10.0.11-1.el5_8 | 0:10.0.11-1.el5_8 |
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| Package | Affected | Fixed |
|---|---|---|
firefoxRed Hat:enterprise_linux:5::server |
before 0:10.0.11-1.el5_8 | 0:10.0.11-1.el5_8 |
firefox-debuginfoRed Hat:enterprise_linux:5::server |
before 0:10.0.11-1.el5_8 | 0:10.0.11-1.el5_8 |
xulrunnerRed Hat:enterprise_linux:5::server |
before 0:10.0.11-1.el5_8 | 0:10.0.11-1.el5_8 |
xulrunner-debuginfoRed Hat:enterprise_linux:5::server |
before 0:10.0.11-1.el5_8 | 0:10.0.11-1.el5_8 |
xulrunner-develRed Hat:enterprise_linux:5::server |
before 0:10.0.11-1.el5_8 | 0:10.0.11-1.el5_8 |
firefoxRed Hat:enterprise_linux:6::client |
before 0:10.0.11-1.el6_3 | 0:10.0.11-1.el6_3 |
firefox-debuginfoRed Hat:enterprise_linux:6::client |
before 0:10.0.11-1.el6_3 | 0:10.0.11-1.el6_3 |
xulrunnerRed Hat:enterprise_linux:6::client |
before 0:10.0.11-1.el6_3 | 0:10.0.11-1.el6_3 |
xulrunner-debuginfoRed Hat:enterprise_linux:6::client |
before 0:10.0.11-1.el6_3 | 0:10.0.11-1.el6_3 |
xulrunner-develRed Hat:enterprise_linux:6::client |
before 0:10.0.11-1.el6_3 | 0:10.0.11-1.el6_3 |
firefoxRed Hat:enterprise_linux:6::computenode |
before 0:10.0.11-1.el6_3 | 0:10.0.11-1.el6_3 |
firefox-debuginfoRed Hat:enterprise_linux:6::computenode |
before 0:10.0.11-1.el6_3 | 0:10.0.11-1.el6_3 |
xulrunnerRed Hat:enterprise_linux:6::computenode |
before 0:10.0.11-1.el6_3 | 0:10.0.11-1.el6_3 |
xulrunner-debuginfoRed Hat:enterprise_linux:6::computenode |
before 0:10.0.11-1.el6_3 | 0:10.0.11-1.el6_3 |
xulrunner-develRed Hat:enterprise_linux:6::computenode |
before 0:10.0.11-1.el6_3 | 0:10.0.11-1.el6_3 |
firefoxRed Hat:enterprise_linux:6::server |
before 0:10.0.11-1.el6_3 | 0:10.0.11-1.el6_3 |
firefox-debuginfoRed Hat:enterprise_linux:6::server |
before 0:10.0.11-1.el6_3 | 0:10.0.11-1.el6_3 |
xulrunnerRed Hat:enterprise_linux:6::server |
before 0:10.0.11-1.el6_3 | 0:10.0.11-1.el6_3 |
xulrunner-debuginfoRed Hat:enterprise_linux:6::server |
before 0:10.0.11-1.el6_3 | 0:10.0.11-1.el6_3 |
xulrunner-develRed Hat:enterprise_linux:6::server |
before 0:10.0.11-1.el6_3 | 0:10.0.11-1.el6_3 |
firefoxRed Hat:enterprise_linux:6::workstation |
before 0:10.0.11-1.el6_3 | 0:10.0.11-1.el6_3 |
firefox-debuginfoRed Hat:enterprise_linux:6::workstation |
before 0:10.0.11-1.el6_3 | 0:10.0.11-1.el6_3 |
xulrunnerRed Hat:enterprise_linux:6::workstation |
before 0:10.0.11-1.el6_3 | 0:10.0.11-1.el6_3 |
xulrunner-debuginfoRed Hat:enterprise_linux:6::workstation |
before 0:10.0.11-1.el6_3 | 0:10.0.11-1.el6_3 |
xulrunner-develRed Hat:enterprise_linux:6::workstation |
before 0:10.0.11-1.el6_3 | 0:10.0.11-1.el6_3 |
thunderbirdRed Hat:enterprise_linux:5::client |
before 0:10.0.11-1.el5_8 | 0:10.0.11-1.el5_8 |
thunderbird-debuginfoRed Hat:enterprise_linux:5::client |
before 0:10.0.11-1.el5_8 | 0:10.0.11-1.el5_8 |
thunderbirdRed Hat:rhel_productivity:5 |
before 0:10.0.11-1.el5_8 | 0:10.0.11-1.el5_8 |
thunderbird-debuginfoRed Hat:rhel_productivity:5 |
before 0:10.0.11-1.el5_8 | 0:10.0.11-1.el5_8 |
thunderbirdRed Hat:enterprise_linux:6::client |
before 0:10.0.11-1.el6_3 | 0:10.0.11-1.el6_3 |
thunderbird-debuginfoRed Hat:enterprise_linux:6::client |
before 0:10.0.11-1.el6_3 | 0:10.0.11-1.el6_3 |
thunderbirdRed Hat:enterprise_linux:6::server |
before 0:10.0.11-1.el6_3 | 0:10.0.11-1.el6_3 |
thunderbird-debuginfoRed Hat:enterprise_linux:6::server |
before 0:10.0.11-1.el6_3 | 0:10.0.11-1.el6_3 |
thunderbirdRed Hat:enterprise_linux:6::workstation |
before 0:10.0.11-1.el6_3 | 0:10.0.11-1.el6_3 |
thunderbird-debuginfoRed Hat:enterprise_linux:6::workstation |
before 0:10.0.11-1.el6_3 | 0:10.0.11-1.el6_3 |
MozillaFirefoxopenSUSE:Tumbleweed |
before 50.1.0-1.1 | 50.1.0-1.1 |
MozillaThunderbirdopenSUSE:Tumbleweed |
before 45.5.1-1.1 | 45.5.1-1.1 |
firefox-esropenSUSE:Tumbleweed |
before 128.5.1-1.1 | 128.5.1-1.1 |
History
| When | Changed | Sources |
|---|---|---|
| 2026-11-03 | aliases | EUVD |
| 2026-11-02 | created | CVE List, GitHub Advisories, NVD, OSV |
References
osvdb.org/87587
ubuntu.com/usn/USN-1638-3
secunia.com/advisories/51370
lists.opensuse.org/opensuse-updates/2012-11/msg00093.html
Show 194 moreShow less
rhn.redhat.com/errata/RHSA-2012-1483.html
mozilla.org/security/announce/2012/mfsa2012-101.html
debian.org/security/2012/dsa-2584
palemoon.org/releasenotes-ng.shtml
securityfocus.com/bid/56632
mandriva.com/security/advisories?name=MDVSA-2012:173
exchange.xforce.ibmcloud.com/vulnerabilities/80179
bugzilla.mozilla.org/show_bug.cgi?id=801681
oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A16955
nvd.nist.gov/vuln/detail/CVE-2012-4207
github.com/advisories/GHSA-jprg-6jgr-c6j9
access.redhat.com/errata/RHSA-2012:1482
bugzilla.redhat.com/show_bug.cgi?id=877614
security.access.redhat.com/data/csaf/v2/advisories/2012/rhsa-2012_1482.json
cve.org/CVERecord?id=CVE-2012-4201
suse.com/security/cve/CVE-2008-5913
This page doesn't list everything
Left out here: 2,001 references. The JSON record has them.