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Vulnerability record · CVE-2011-2378 · published 18 August 2011

CVE-2011-2378: Mozilla firefox code injection vulnerability

Mozilla · Firefox

The appendChild function in Mozilla Firefox before 3.6.20, Thunderbird 3.x before 3.1.12, SeaMonkey 2.x, and possibly other products does not properly handle DOM objects, which allows remote attackers to execute arbitrary code via unspecified vectors that lead to dereferencing of a "dangling pointer."

10.0 CVSS 2.0 High EPSS 5.6% · top 7.4% CWE-94 · Code injection
10.0CVSS 2.0 base score
5.6%EPSS exploitation probability, 30 days
NoNot in CISA KEV
3Affected product versions listed by NVD
22References
16 Jun 2026Last modified by NVD

Description

The appendChild function in Mozilla Firefox before 3.6.20, Thunderbird 3.x before 3.1.12, SeaMonkey 2.x, and possibly other products does not properly handle DOM objects, which allows remote attackers to execute arbitrary code via unspecified vectors that lead to dereferencing of a "dangling pointer."

AV:N/AC:L/Au:N/C:C/I:C/A:C

Affected products

3 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
http://lists.opensuse.org/opensuse-security-announce/2011-08/msg00023.html
http://lists.opensuse.org/opensuse-security-announce/2011-08/msg00027.html
http://www.debian.org/security/2011/dsa-2295
http://www.debian.org/security/2011/dsa-2296
http://www.debian.org/security/2011/dsa-2297
http://www.mandriva.com/security/advisories?name=MDVSA-2011:127
http://www.mozilla.org/security/announce/2011/mfsa2011-30.html Vendor Advisory
http://www.redhat.com/support/errata/RHSA-2011-1164.html Vendor Advisory
http://www.redhat.com/support/errata/RHSA-2011-1166.html Vendor Advisory
https://bugzilla.mozilla.org/show_bug.cgi?id=648065
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A14163
http://lists.opensuse.org/opensuse-security-announce/2011-08/msg00023.html
http://lists.opensuse.org/opensuse-security-announce/2011-08/msg00027.html
http://www.debian.org/security/2011/dsa-2295
http://www.debian.org/security/2011/dsa-2296
http://www.debian.org/security/2011/dsa-2297
http://www.mandriva.com/security/advisories?name=MDVSA-2011:127
http://www.mozilla.org/security/announce/2011/mfsa2011-30.html Vendor Advisory
http://www.redhat.com/support/errata/RHSA-2011-1164.html Vendor Advisory
http://www.redhat.com/support/errata/RHSA-2011-1166.html Vendor Advisory
https://bugzilla.mozilla.org/show_bug.cgi?id=648065
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A14163

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2011-2378), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.