Is CVE-2012-4193 being actively exploited?

CVE-2012-4193 is not currently listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.

What is the CVSS score for CVE-2012-4193?

CVE-2012-4193 has a CVSS 2.0 base score of 6.8 (MEDIUM).

CVE-2012-4193

MEDIUM · CVSS 6.8EPSS 1.2%EU EUVD

Mozilla Firefox before 16.0.1, Firefox ESR 10.x before 10.0.9, Thunderbird before 16.0.1, Thunderbird ESR 10.x before 10.0.9, and SeaMonkey before 2.13.1 omit a security check in the defaultValue function during the unwrapping of security wrappers, which allows remote attackers to bypass the Same Origin Policy and read the properties of a Location object, or execute arbitrary JavaScript code, via a crafted web site.

Key facts

CVSS score: 6.8 (v2.0)
Severity: MEDIUM
CVSS vector: AV:N/AC:M/Au:N/C:P/I:P/A:P
Weakness (CWE): CWE-346
EPSS score: 1.2% (67th percentile)
In CISA KEV: No
In EU EUVD: Yes (EUVD-2012-4137)
Published: October 12, 2012
NVD last modified: June 16, 2026
Status: Modified

EU Vulnerability Database (EUVD)

This vulnerability is also tracked by ENISA as EUVD-2012-4137 in the EU Vulnerability Database. Last updated in EUVD on August 6, 2024.

View on the EU Vulnerability Database

Affected products

canonical / ubuntu linux
canonical / ubuntu linux
canonical / ubuntu linux
canonical / ubuntu linux
mozilla / firefox
mozilla / seamonkey
mozilla / thunderbird
mozilla / thunderbird esr
redhat / enterprise linux desktop
redhat / enterprise linux desktop
redhat / enterprise linux eus
redhat / enterprise linux server
redhat / enterprise linux server
redhat / enterprise linux workstation
redhat / enterprise linux workstation
suse / linux enterprise desktop
suse / linux enterprise desktop
suse / linux enterprise server
suse / linux enterprise server
suse / linux enterprise server
suse / linux enterprise software development kit

Certified products that may be affected

3 FIPS 140 or Common Criteria certified products, from automated matching by sec-certs.org.

SUSE Linux Enterprise Server 11 Service Pack 2 on IBM System z - SUSE Linux Products Gmbh - Common Criteria BSI-DSZ-CC-0852-2013 - archived
SUSE Linux Enterprise Server 11 Service Pack 2 including KVM virtualization - SUSE Linux Products Gmbh - Common Criteria BSI-DSZ-CC-0787-2013 - archived
Red Hat Enterprise Linux 5 OpenSSH-Server Cryptographic Module - Red Hat®, Inc. - FIPS 140 1384 - historical

References

http://lists.opensuse.org/opensuse-security-announce/2012-10/msg00010.html(Mailing List, Third Party Advisory)
http://rhn.redhat.com/errata/RHSA-2012-1361.html(Third Party Advisory)
http://rhn.redhat.com/errata/RHSA-2012-1362.html(Third Party Advisory)
http://secunia.com/advisories/50904(Third Party Advisory)
http://secunia.com/advisories/50906(Third Party Advisory)
http://secunia.com/advisories/50907(Third Party Advisory)
http://secunia.com/advisories/50964(Third Party Advisory)
http://secunia.com/advisories/50984(Third Party Advisory)
http://secunia.com/advisories/55318(Third Party Advisory)
http://www.mozilla.org/security/announce/2012/mfsa2012-89.html(Vendor Advisory)
http://www.ubuntu.com/usn/USN-1611-1(Third Party Advisory)
https://bugzilla.mozilla.org/show_bug.cgi?id=720619(Exploit, Issue Tracking, Patch, Vendor Advisory)
https://exchange.xforce.ibmcloud.com/vulnerabilities/79211(Third Party Advisory, VDB Entry)
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A16786(Third Party Advisory)

Last updated September 17, 2026 · Source: NVD, CISA KEV, FIRST.org EPSS

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