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Fencer Intel
critical 9.3

CVE-2011-3647 json

The JSSubScriptLoader in Mozilla Firefox before 3.6.24 and Thunderbird before 3.1.6 does not properly handle XPCNativeWrappers during calls…

published 2011-11-09 15 y ago modified 2026-06-16 4 mo ago also EUVD-2011-3606

cvss
9.3
version 2.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
1.9%
EPSS 1.9% chance of exploitation in 30 days, percentile 79%
public exploits
0
none known

Summary

The JSSubScriptLoader in Mozilla Firefox before 3.6.24 and Thunderbird before 3.1.6 does not properly handle XPCNativeWrappers during calls to the loadSubScript method in an add-on, which makes it easier for remote attackers to gain privileges via a crafted web site that leverages certain unwrapping behavior, a related issue to CVE-2011-3004.

Patch / fix

  • thunderbird RHEL 6 3.1.16-2.el6_1
  • firefox RHEL 4 3.6.24-3.el4
  • firefox RHEL 5 3.6.24-3.el5_7
  • firefox RHEL 6 3.6.24-3.el6_1
  • xulrunner RHEL 5 1.9.2.24-2.el5_7
  • xulrunner RHEL 6 1.9.2.24-2.el6_1.1

red hat advisories RHSA-2011:1439RHSA-2011:1437

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-2011-3647 updated cvss 6.8

Mozilla: Security problem with loadSubScript on 1.9.2 branch (MFSA 2011-46)

  • Red Hat Enterprise Linux (v. 5 server) firefox 3.6.24-3.el5_7, xulrunner 1.9.2.24-2.el5_7 Red Hat Enterprise Linux AS version 4 firefox 3.6.24-3.el4 Red Hat Enterprise Linux Desktop (v. 5 client) firefox 3.6.24-3.el5_7, xulrunner 1.9.2.24-2.el5_7 Red Hat Enterprise Linux Desktop version 4 firefox 3.6.24-3.el4 Red Hat Enterprise Linux ES version 4 firefox 3.6.24-3.el4 Red Hat Enterprise Linux Server (v. 6) firefox 3.6.24-3.el6_1, xulrunner 1.9.2.24-2.el6_1.1
    +3 more products
    Red Hat Enterprise Linux Server Optional (v. 6) thunderbird 3.1.16-2.el6_1, xulrunner 1.9.2.24-2.el6_1.1 Red Hat Enterprise Linux WS version 4 firefox 3.6.24-3.el4 Red Hat RHEL Desktop Workstation (v. 5 client) xulrunner 1.9.2.24-2.el5_7
    fixed: vendor fix RHSA-2011:1437

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

1.88% chance of exploitation in the next 30 days, higher than 79% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
NVD 2.0 9.3 AV:N/AC:M/Au:N/C:C/I:C/A:C

Classification

Weakness
  • CWE-20 Improper Input Validation

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.