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Fencer Intel
medium 4.3

CVE-2011-2999 json

Mozilla Firefox before 3.6.23 and 4.x through 5, Thunderbird before 6.0, and SeaMonkey before 2.3 do not properly handle "location" as the…

published 2011-09-29 15 y ago modified 2026-06-16 4 mo ago also EUVD-2011-2967

cvss
4.3
version 2.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
1.1%
EPSS 1.1% chance of exploitation in 30 days, percentile 65%
public exploits
0
none known

Summary

Mozilla Firefox before 3.6.23 and 4.x through 5, Thunderbird before 6.0, and SeaMonkey before 2.3 do not properly handle "location" as the name of a frame, which allows remote attackers to bypass the Same Origin Policy via a crafted web site, a different vulnerability than CVE-2010-0170.

Patch / fix

  • seamonkey RHEL 4 1.0.9-76.el4
  • seamonkey-chat RHEL 4 1.0.9-76.el4
  • seamonkey-mail RHEL 4 1.0.9-76.el4
  • seamonkey-js-debugger RHEL 4 1.0.9-76.el4
  • seamonkey-dom-inspector RHEL 4 1.0.9-76.el4
  • thunderbird RHEL 4 1.5.0.12-44.el4
  • thunderbird RHEL 5 PRODUCTIVITY, RHEL 5 2.0.0.24-26.el5_7
  • thunderbird RHEL 6 3.1.15-1.el6_1

red hat advisories RHSA-2011:1344RHSA-2011:1343RHSA-2011:1342RHSA-2011:1341

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-2011-2999 updated cvss 6.8

Mozilla: XSS via plugins and shadowed window.location object (MFSA 2011-38)

  • Red Hat Enterprise Linux (v. 5 server) firefox 3.6.23-2.el5_7, xulrunner 1.9.2.23-1.el5_7 Red Hat Enterprise Linux AS version 4 firefox 3.6.23-1.el4, seamonkey 1.0.9-76.el4, seamonkey-chat 1.0.9-76.el4, seamonkey-mail 1.0.9-76.el4, thunderbird 1.5.0.12-44.el4, seamonkey-js-debugger 1.0.9-76.el4, +1 more Red Hat Enterprise Linux Desktop (v. 5 client) firefox 3.6.23-2.el5_7, xulrunner 1.9.2.23-1.el5_7, thunderbird 2.0.0.24-26.el5_7 Red Hat Enterprise Linux Desktop version 4 firefox 3.6.23-1.el4, seamonkey 1.0.9-76.el4, seamonkey-chat 1.0.9-76.el4, seamonkey-mail 1.0.9-76.el4, thunderbird 1.5.0.12-44.el4, seamonkey-js-debugger 1.0.9-76.el4, +1 more Red Hat Enterprise Linux ES version 4 firefox 3.6.23-1.el4, seamonkey 1.0.9-76.el4, seamonkey-chat 1.0.9-76.el4, seamonkey-mail 1.0.9-76.el4, thunderbird 1.5.0.12-44.el4, seamonkey-js-debugger 1.0.9-76.el4, +1 more Red Hat Enterprise Linux Server (v. 6) firefox 3.6.23-2.el6_1, xulrunner 1.9.2.23-1.el6_1.1
    +3 more products
    Red Hat Enterprise Linux Server Optional (v. 6) thunderbird 3.1.15-1.el6_1, xulrunner 1.9.2.23-1.el6_1.1 Red Hat Enterprise Linux WS version 4 firefox 3.6.23-1.el4, seamonkey 1.0.9-76.el4, seamonkey-chat 1.0.9-76.el4, seamonkey-mail 1.0.9-76.el4, thunderbird 1.5.0.12-44.el4, seamonkey-js-debugger 1.0.9-76.el4, +1 more Red Hat RHEL Desktop Workstation (v. 5 client) xulrunner 1.9.2.23-1.el5_7
    fixed: vendor fix RHSA-2011:1341
  • Red Hat RHEL Optional Productivity Applications (v. 5 server) thunderbird 2.0.0.24-26.el5_7
    fixed: vendor fix RHSA-2011:1343

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

1.09% chance of exploitation in the next 30 days, higher than 65% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
NVD 2.0 4.3 AV:N/AC:M/Au:N/C:N/I:P/A:N

Classification

Weakness
  • CWE-264 Permissions, Privileges, and Access Controls

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.