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Fencer Intel
medium 6.8

CVE-2012-4193 json

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…

published 2012-10-12 14 y ago modified 2026-06-16 4 mo ago also EUVD-2012-4137

cvss
6.8
version 2.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
1.2%
EPSS 1.2% chance of exploitation in 30 days, percentile 67%
public exploits
0
none known

Summary

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.

Patch / fix

  • mozilla firefox 10.0.9, 16.0.1
  • mozilla seamonkey 2.13.1
  • mozilla thunderbird 16.0.1
  • mozilla thunderbird_esr 10.0.9
  • thunderbird RHEL 5 PRODUCTIVITY, RHEL 5 10.0.8-2.el5_8
  • thunderbird RHEL 6 10.0.8-2.el6_3
  • xulrunner RHEL 5 10.0.8-2.el5_8
  • xulrunner RHEL 6 10.0.8-2.el6_3

red hat advisories RHSA-2012:1362RHSA-2012:1361

  • MozillaFirefox openSUSE Tumbleweed 50.1.0-1.1
  • MozillaThunderbird openSUSE Tumbleweed 45.5.1-1.1

opensuse advisories openSUSE-SU-2024:10071-1openSUSE-SU-2024:10230-1

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2012-4193 updated cvss 6.8

Mozilla: defaultValue security checks not applied (MFSA 2012-89)

  • Red Hat Enterprise Linux 5 firefox
    affected: no fix available
  • Red Hat Enterprise Linux (v. 5 server) xulrunner 10.0.8-2.el5_8
    fixed: vendor fix RHSA-2012:1361
  • Red Hat Enterprise Linux Desktop (v. 5 client) xulrunner 10.0.8-2.el5_8, thunderbird 10.0.8-2.el5_8 Red Hat Enterprise Linux Desktop (v. 6) xulrunner 10.0.8-2.el6_3, thunderbird 10.0.8-2.el6_3
    fixed: vendor fix RHSA-2012:1362
  • Red Hat Enterprise Linux Desktop Optional (v. 6) xulrunner 10.0.8-2.el6_3 Red Hat Enterprise Linux HPC Node Optional (v. 6) xulrunner 10.0.8-2.el6_3 Red Hat Enterprise Linux Server (v. 6) xulrunner 10.0.8-2.el6_3
    fixed: vendor fix RHSA-2012:1361
  • Red Hat Enterprise Linux Server Optional (v. 6) xulrunner 10.0.8-2.el6_3, thunderbird 10.0.8-2.el6_3 Red Hat Enterprise Linux Workstation (v. 6) xulrunner 10.0.8-2.el6_3, thunderbird 10.0.8-2.el6_3
    fixed: vendor fix RHSA-2012:1362
  • Red Hat Enterprise Linux Workstation Optional (v. 6) xulrunner 10.0.8-2.el6_3 Red Hat RHEL Desktop Workstation (v. 5 client) xulrunner 10.0.8-2.el5_8
    fixed: vendor fix RHSA-2012:1361
  • Red Hat RHEL Optional Productivity Applications (v. 5 server) thunderbird 10.0.8-2.el5_8
    fixed: vendor fix RHSA-2012:1362

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

1.16% chance of exploitation in the next 30 days, higher than 67% of all scored CVEs (FIRST EPSS, 2026-11-09).

Exploits and checks

  • bugzilla.mozilla.org https://bugzilla.mozilla.org/show_bug.cgi?id=720619 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
NVD 2.0 6.8 AV:N/AC:M/Au:N/C:P/I:P/A:P

Classification

Weakness

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.