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Fencer Intel
critical 10.0

CVE-2011-2984 json

Mozilla Firefox before 3.6.20, SeaMonkey 2.x, Thunderbird 3.x before 3.1.12, and possibly other products does not properly handle the dropp…

published 2011-08-18 15 y ago modified 2026-06-16 4 mo ago also EUVD-2011-2952

cvss
10.0
version 2.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
3.6%
EPSS 3.6% chance of exploitation in 30 days, percentile 89%
public exploits
0
none known

Summary

Mozilla Firefox before 3.6.20, SeaMonkey 2.x, Thunderbird 3.x before 3.1.12, and possibly other products does not properly handle the dropping of a tab element, which allows remote attackers to execute arbitrary JavaScript code with chrome privileges by establishing a content area and registering for drop events.

Patch / fix

  • firefox RHEL 4 3.6.20-2.el4
  • firefox RHEL 5 3.6.20-2.el5
  • firefox RHEL 6 3.6.20-2.el6_1
  • xulrunner RHEL 5 1.9.2.20-2.el5
  • xulrunner RHEL 6 1.9.2.20-2.el6_1

red hat advisories RHSA-2011:1164

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-2011-2984 updated cvss 5.1

Mozilla: Privilege escalation dropping a tab element in content area

  • Red Hat Enterprise Linux 6 thunderbird
    affected: no fix available
  • Red Hat Enterprise Linux (v. 5 server) firefox 3.6.20-2.el5, xulrunner 1.9.2.20-2.el5 Red Hat Enterprise Linux AS version 4 firefox 3.6.20-2.el4 Red Hat Enterprise Linux Desktop (v. 5 client) firefox 3.6.20-2.el5, xulrunner 1.9.2.20-2.el5 Red Hat Enterprise Linux Desktop version 4 firefox 3.6.20-2.el4 Red Hat Enterprise Linux Desktop Workstation (v. 5 client) xulrunner 1.9.2.20-2.el5 Red Hat Enterprise Linux ES version 4 firefox 3.6.20-2.el4
    +3 more products
    Red Hat Enterprise Linux Server (v. 6) firefox 3.6.20-2.el6_1, xulrunner 1.9.2.20-2.el6_1 Red Hat Enterprise Linux Server Optional (v. 6) xulrunner 1.9.2.20-2.el6_1 Red Hat Enterprise Linux WS version 4 firefox 3.6.20-2.el4
    fixed: vendor fix RHSA-2011:1164

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

3.59% chance of exploitation in the next 30 days, higher than 89% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
NVD 2.0 10.0 AV:N/AC:L/Au:N/C:C/I:C/A:C

Classification

Weakness
  • CWE-94 Improper Control of Generation of Code

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.