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CVE-2012-1959

20
FAUCET Score

CVE-2012-1959 describes a security bypass vulnerability in Mozilla Firefox, Thunderbird, and SeaMonkey versions. The flaw stems from an oversight in how these browsers handle cross-compartment object wrapping, specifically neglecting same-compartment security wrappers. This allows remote attackers to bypass XBL access restrictions through specially crafted content. With a CVSS score of 5.0, this vulnerability is rated as medium severity. It is a network-based attack with low complexity, requiring no authentication, and primarily impacts integrity (partial). There is no direct impact on confidentiality or availability. Currently, there is no evidence of active exploitation, nor are there publicly available exploit codes in Metasploit, Nuclei, or ExploitDB. Community discussion and media coverage for this CVE are minimal, indicating low public awareness and attention.

Impacted Technologies

VendorProductVersion(s)CPE
4.0CPE matchmatch criteria
cpe:2.3:a:mozilla:firefox:4.0:*:*:*:*:*:*:*
4.0CPE matchmatch criteria
cpe:2.3:a:mozilla:firefox:4.0:beta1:*:*:*:*:*:*
4.0CPE matchmatch criteria
cpe:2.3:a:mozilla:firefox:4.0:beta10:*:*:*:*:*:*
4.0CPE matchmatch criteria
cpe:2.3:a:mozilla:firefox:4.0:beta11:*:*:*:*:*:*
4.0CPE matchmatch criteria
cpe:2.3:a:mozilla:firefox:4.0:beta12:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

5.0MEDIUM

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

Confidentiality Impact
NONE
Integrity Impact
PARTIAL
Availability Impact
NONE
Access Vector
NETWORK
Access Complexity
LOW
Authentication
NONE
Exploitability Score
10.0
Impact Score
2.9
CvssVersion
2.0

Exploit Intelligence

EPSS Score
2.46%
Probability of exploitation in next 30 days
EPSS Percentile
82.8%
Percentile rank of EPSS score among Peer Group
As of 2026-07-26
Model: v2026.06.15
This CVE's current EPSS score of 0.0246 is in the 74th percentile among its peer group of 23,701 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (7)

redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 5Fixed in: thunderbird-0:10.0.6-1.el5_8
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 5Fixed in: firefox-0:10.0.6-1.el5_8
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 5Fixed in: xulrunner-0:10.0.6-2.el5_8
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 6Fixed in: thunderbird-0:10.0.6-1.el6_3
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 6Fixed in: firefox-0:10.0.6-1.el6_3
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 6Fixed in: xulrunner-0:10.0.6-1.el6_3
View patch
mozillavendor investigatingvia nvd_reference
View patch

Vendor Advisories (1)

redhatCVE-2012-1959Critical

Mozilla: Same-compartment Security Wrappers can be bypassed (MFSA 2012-49)

Jul 17, 2012

References

lists.opensuse.org / opensuse-security-announce/2012-07/msg00011.html
lists.opensuse.org / opensuse-security-announce/2012-07/msg00012.html
lists.opensuse.org / opensuse-security-announce/2012-07/msg00013.html
lists.opensuse.org / opensuse-security-announce/2012-07/msg00016.html
osvdb.org / 84002
rhn.redhat.com / errata/RHSA-2012-1088.html
bugzilla.mozilla.org / show_bug.cgi
bugzilla.mozilla.org / show_bug.cgi
secunia.com / advisories/49965
secunia.com / advisories/49968
secunia.com / advisories/49972
secunia.com / advisories/49977
secunia.com / advisories/49979
secunia.com / advisories/49992
secunia.com / advisories/49993
secunia.com / advisories/49994
oval.cisecurity.org / repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A16920
mozilla.org / security/announce/2012/mfsa2012-49.html
Vendor Advisory
securityfocus.com / bid/54576
securitytracker.com / id
securitytracker.com / id
securitytracker.com / id
ubuntu.com / usn/USN-1509-1
ubuntu.com / usn/USN-1509-2
ubuntu.com / usn/USN-1510-1