Is CVE-2012-5841 being actively exploited?

CVE-2012-5841 is not currently listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.

What is the CVSS score for CVE-2012-5841?

CVE-2012-5841 has a CVSS 2.0 base score of 4.3 (MEDIUM).

CVE-2012-5841

MEDIUM · CVSS 4.3EPSS 1.9%EU EUVD

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 implement cross-origin wrappers with a filtering behavior that does not properly restrict write actions, which allows remote attackers to conduct cross-site scripting (XSS) attacks via a crafted web site.

Key facts

CVSS score: 4.3 (v2.0)
Severity: MEDIUM
CVSS vector: AV:N/AC:M/Au:N/C:N/I:P/A:N
Weakness (CWE): CWE-79
EPSS score: 1.9% (80th percentile)
In CISA KEV: No
In EU EUVD: Yes (EUVD-2012-5719)
Published: November 21, 2012
NVD last modified: June 16, 2026
Status: Modified

EU Vulnerability Database (EUVD)

This vulnerability is also tracked by ENISA as EUVD-2012-5719 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
opensuse / opensuse
opensuse / opensuse
opensuse / opensuse
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
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/2012-11/msg00021.html(Mailing List, Third Party Advisory)
http://lists.opensuse.org/opensuse-security-announce/2013-01/msg00022.html(Mailing List, Third Party Advisory)
http://lists.opensuse.org/opensuse-updates/2012-11/msg00090.html(Mailing List, Third Party Advisory)
http://lists.opensuse.org/opensuse-updates/2012-11/msg00092.html(Mailing List, Third Party Advisory)
http://lists.opensuse.org/opensuse-updates/2012-11/msg00093.html(Mailing List, Third Party Advisory)
http://osvdb.org/87588(Broken Link)
http://rhn.redhat.com/errata/RHSA-2012-1482.html(Third Party Advisory)
http://rhn.redhat.com/errata/RHSA-2012-1483.html(Third Party Advisory)
http://secunia.com/advisories/51359(Third Party Advisory)
http://secunia.com/advisories/51360(Third Party Advisory)
http://secunia.com/advisories/51369(Third Party Advisory)
http://secunia.com/advisories/51370(Third Party Advisory)
http://secunia.com/advisories/51381(Third Party Advisory)
http://secunia.com/advisories/51434(Third Party Advisory)
http://secunia.com/advisories/51439(Third Party Advisory)
http://secunia.com/advisories/51440(Third Party Advisory)
http://www.mandriva.com/security/advisories?name=MDVSA-2012:173(Third Party Advisory)
http://www.mozilla.org/security/announce/2012/mfsa2012-100.html(Vendor Advisory)
http://www.securityfocus.com/bid/56631(Third Party Advisory, VDB Entry)
http://www.ubuntu.com/usn/USN-1636-1(Third Party Advisory)
http://www.ubuntu.com/usn/USN-1638-1(Third Party Advisory)
http://www.ubuntu.com/usn/USN-1638-2(Third Party Advisory)
http://www.ubuntu.com/usn/USN-1638-3(Third Party Advisory)
https://bugzilla.mozilla.org/show_bug.cgi?id=805807(Issue Tracking, Patch, Vendor Advisory)
https://exchange.xforce.ibmcloud.com/vulnerabilities/80178(Third Party Advisory, VDB Entry)
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A16590(Third Party Advisory)

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

Query CVEs from your AI assistant

The CVE/NVD Explorer brain answers CVE questions directly inside Claude, ChatGPT, or any MCP assistant — always up to date, no setup. Add it once and stop pasting advisories into chat.

Add the CVE brain