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CVE-2009-1841

27
FAUCET Score

CVE-2009-1841 describes a critical vulnerability in Mozilla Firefox, Thunderbird, and SeaMonkey versions prior to 3.0.11, 2.0.0.22, and 1.1.17 respectively. This flaw, located in js/src/xpconnect/src/xpcwrappedjsclass.cpp, allows remote attackers to execute arbitrary web script with elevated chrome object privileges, exemplified by the browser sidebar and FeedWriter. With a CVSS score of 9.3, this vulnerability is highly severe, requiring medium attack complexity but enabling complete confidentiality, integrity, and availability compromise. There is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
<= 3.0.10CPE matchmatch criteria
cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:*
0.1CPE matchmatch criteria
cpe:2.3:a:mozilla:firefox:0.1:*:*:*:*:*:*:*
0.2CPE matchmatch criteria
cpe:2.3:a:mozilla:firefox:0.2:*:*:*:*:*:*:*
0.3CPE matchmatch criteria
cpe:2.3:a:mozilla:firefox:0.3:*:*:*:*:*:*:*
0.4CPE matchmatch criteria
cpe:2.3:a:mozilla:firefox:0.4:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

9.3HIGH

AV:N/AC:M/Au:N/C:C/I:C/A:C

Confidentiality Impact
COMPLETE
Integrity Impact
COMPLETE
Availability Impact
COMPLETE
Access Vector
NETWORK
Access Complexity
MEDIUM
Authentication
NONE
Exploitability Score
8.6
Impact Score
10.0
CvssVersion
2.0

Exploit Intelligence

EPSS Score
4.79%
Probability of exploitation in next 30 days
EPSS Percentile
91.0%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.0479 is in the 57th percentile among its peer group of 8,920 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.2 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (6)

redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 3Fixed in: seamonkey-0:1.0.9-0.38.el3
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 4Fixed in: firefox-0:3.0.11-4.el4
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 4Fixed in: seamonkey-0:1.0.9-43.el4_8
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 5Fixed in: firefox-0:3.0.11-2.el5_3
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 5Fixed in: xulrunner-0:1.9.0.11-3.el5_3
View patch
mozillavendor investigatingvia nvd_reference
View patch

Vendor Advisories (1)

redhatCVE-2009-1841Critical

Firefox JavaScript arbitrary code execution

Jun 11, 2009

References

osvdb.org / 55159
rhn.redhat.com / errata/RHSA-2009-1096.html
bugzilla.mozilla.org / show_bug.cgi
bugzilla.redhat.com / show_bug.cgi
secunia.com / advisories/35331
Vendor Advisory
secunia.com / advisories/35415
secunia.com / advisories/35428
Vendor Advisory
secunia.com / advisories/35431
Vendor Advisory
secunia.com / advisories/35439
Vendor Advisory
secunia.com / advisories/35440
Vendor Advisory
secunia.com / advisories/35468
secunia.com / advisories/35536
secunia.com / advisories/35561
secunia.com / advisories/35602
secunia.com / advisories/35882
slackware.com / security/viewer.php
slackware.com / security/viewer.php
oval.cisecurity.org / repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A9815
rhn.redhat.com / errata/RHSA-2009-1095.html
sunsolve.sun.com / search/document.do
redhat.com / archives/fedora-package-announce/2009-July/msg00444.html
redhat.com / archives/fedora-package-announce/2009-July/msg00504.html
redhat.com / archives/fedora-package-announce/2009-June/msg00574.html
redhat.com / archives/fedora-package-announce/2009-June/msg00657.html
debian.org / security/2009/dsa-1820
debian.org / security/2009/dsa-1830
mandriva.com / security/advisories
mozilla.org / security/announce/2009/mfsa2009-32.html
Vendor Advisory
securityfocus.com / bid/35326
securityfocus.com / bid/35373
securitytracker.com / id
slackware.com / security/viewer.php
ubuntu.com / usn/usn-782-1
vupen.com / english/advisories/2009/1572
PatchVendor Advisory