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Fencer Vulns
critical 9.3

CVE-2009-1841 json

js/src/xpconnect/src/xpcwrappedjsclass.cpp in Mozilla Firefox before 3.0.11, Thunderbird before 2.0.0.22, and SeaMonkey before 1.1.17 allow…

published 2009-06-12 17 y ago modified 2026-06-16 4 mo ago also EUVD-2009-1836

cvss
9.3
version 2.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
4.8%
EPSS 4.8% chance of exploitation in 30 days, percentile 92%
public exploits
0
none known

Summary

js/src/xpconnect/src/xpcwrappedjsclass.cpp in Mozilla Firefox before 3.0.11, Thunderbird before 2.0.0.22, and SeaMonkey before 1.1.17 allows remote attackers to execute arbitrary web script with the privileges of a chrome object, as demonstrated by the browser sidebar and the FeedWriter.

Patch / fix

  • seamonkey RHEL 3 1.0.9-0.38.el3
  • seamonkey RHEL 4 1.0.9-43.el4_8
  • seamonkey-nss RHEL 3 1.0.9-0.38.el3
  • seamonkey-chat RHEL 3 1.0.9-0.38.el3
  • seamonkey-chat RHEL 4 1.0.9-43.el4_8
  • seamonkey-mail RHEL 3 1.0.9-0.38.el3
  • seamonkey-mail RHEL 4 1.0.9-43.el4_8
  • seamonkey-nspr RHEL 3 1.0.9-0.38.el3

red hat advisories RHSA-2009:1096RHSA-2009:1095

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-2009-1841 updated cvss 6.8

Firefox JavaScript arbitrary code execution

  • Red Hat Desktop version 3 seamonkey 1.0.9-0.38.el3, seamonkey-nss 1.0.9-0.38.el3, seamonkey-chat 1.0.9-0.38.el3, seamonkey-mail 1.0.9-0.38.el3, seamonkey-nspr 1.0.9-0.38.el3, seamonkey-js-debugger 1.0.9-0.38.el3, +1 more
    fixed: vendor fix RHSA-2009:1096
  • Red Hat Enterprise Linux (v. 5 server) firefox 3.0.11-2.el5_3, xulrunner 1.9.0.11-3.el5_3, xulrunner-devel-unstable 1.9.0.11-3.el5_3
    fixed: vendor fix RHSA-2009:1095
  • Red Hat Enterprise Linux AS version 3 seamonkey 1.0.9-0.38.el3, seamonkey-nss 1.0.9-0.38.el3, seamonkey-chat 1.0.9-0.38.el3, seamonkey-mail 1.0.9-0.38.el3, seamonkey-nspr 1.0.9-0.38.el3, seamonkey-js-debugger 1.0.9-0.38.el3, +1 more Red Hat Enterprise Linux AS version 4 firefox 3.0.11-4.el4, seamonkey 1.0.9-43.el4_8, seamonkey-chat 1.0.9-43.el4_8, seamonkey-mail 1.0.9-43.el4_8, seamonkey-js-debugger 1.0.9-43.el4_8, seamonkey-dom-inspector 1.0.9-43.el4_8
    fixed: vendor fix RHSA-2009:1096
  • Red Hat Enterprise Linux Desktop (v. 5 client) firefox 3.0.11-2.el5_3, xulrunner 1.9.0.11-3.el5_3, xulrunner-devel-unstable 1.9.0.11-3.el5_3
    fixed: vendor fix RHSA-2009:1095
  • Red Hat Enterprise Linux Desktop version 4 firefox 3.0.11-4.el4, seamonkey 1.0.9-43.el4_8, seamonkey-chat 1.0.9-43.el4_8, seamonkey-mail 1.0.9-43.el4_8, seamonkey-js-debugger 1.0.9-43.el4_8, seamonkey-dom-inspector 1.0.9-43.el4_8
    fixed: vendor fix RHSA-2009:1096
  • Red Hat Enterprise Linux Desktop Workstation (v. 5 client) xulrunner 1.9.0.11-3.el5_3, xulrunner-devel-unstable 1.9.0.11-3.el5_3
    fixed: vendor fix RHSA-2009:1095
  • Red Hat Enterprise Linux ES version 3 seamonkey 1.0.9-0.38.el3, seamonkey-nss 1.0.9-0.38.el3, seamonkey-chat 1.0.9-0.38.el3, seamonkey-mail 1.0.9-0.38.el3, seamonkey-nspr 1.0.9-0.38.el3, seamonkey-js-debugger 1.0.9-0.38.el3, +1 more Red Hat Enterprise Linux ES version 4 firefox 3.0.11-4.el4, seamonkey 1.0.9-43.el4_8, seamonkey-chat 1.0.9-43.el4_8, seamonkey-mail 1.0.9-43.el4_8, seamonkey-js-debugger 1.0.9-43.el4_8, seamonkey-dom-inspector 1.0.9-43.el4_8 Red Hat Enterprise Linux WS version 3 seamonkey 1.0.9-0.38.el3, seamonkey-nss 1.0.9-0.38.el3, seamonkey-chat 1.0.9-0.38.el3, seamonkey-mail 1.0.9-0.38.el3, seamonkey-nspr 1.0.9-0.38.el3, seamonkey-js-debugger 1.0.9-0.38.el3, +1 more Red Hat Enterprise Linux WS version 4 firefox 3.0.11-4.el4, seamonkey 1.0.9-43.el4_8, seamonkey-chat 1.0.9-43.el4_8, seamonkey-mail 1.0.9-43.el4_8, seamonkey-js-debugger 1.0.9-43.el4_8, seamonkey-dom-inspector 1.0.9-43.el4_8
    fixed: vendor fix RHSA-2009:1096

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

4.79% chance of exploitation in the next 30 days, higher than 92% of all scored CVEs (FIRST EPSS, 2026-11-08).

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-94 Improper Control of Generation of Code

References

Sources

Fencer Vulns 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.