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CVE-2009-1833

29
FAUCET Score

CVE-2009-1833 describes a critical vulnerability in the JavaScript engine of Mozilla Firefox before 3.0.11, Thunderbird before 2.0.0.22, and SeaMonkey before 1.1.17. This flaw, stemming from issues like js_LeaveSharpObject and ParseXMLSource, could lead to memory corruption, application crashes, or potentially arbitrary code execution. With a CVSS score of 9.3, it represents a high-severity risk, allowing unauthenticated remote attackers to exploit it with medium complexity. Despite its severity, there is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage.

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
9.18%
Probability of exploitation in next 30 days
EPSS Percentile
94.8%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.0918 is in the 75th 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 (8)

redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 5Fixed in: thunderbird-0:2.0.0.22-2.el5_3
View patch
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 4Fixed in: thunderbird-0:1.5.0.12-23.el4
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-2009-1833Critical

Firefox JavaScript engine crashes

Jun 11, 2009

References

osvdb.org / 55152
osvdb.org / 55153
osvdb.org / 55154
rhn.redhat.com / errata/RHSA-2009-1096.html
bugzilla.mozilla.org / show_bug.cgi
Exploit
bugzilla.mozilla.org / show_bug.cgi
Exploit
bugzilla.mozilla.org / show_bug.cgi
Exploit
bugzilla.mozilla.org / show_bug.cgi
bugzilla.redhat.com / show_bug.cgi
Exploit
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
securitytracker.com / id
Patch
slackware.com / security/viewer.php
slackware.com / security/viewer.php
oval.cisecurity.org / repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A11487
rhn.redhat.com / errata/RHSA-2009-1095.html
sunsolve.sun.com / search/document.do
sunsolve.sun.com / search/document.do
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
mandriva.com / security/advisories
mozilla.org / security/announce/2009/mfsa2009-24.html
Vendor Advisory
redhat.com / support/errata/RHSA-2009-1125.html
redhat.com / support/errata/RHSA-2009-1126.html
securityfocus.com / bid/35326
securityfocus.com / bid/35372
securitytracker.com / id
slackware.com / security/viewer.php
ubuntu.com / usn/usn-782-1
vupen.com / english/advisories/2009/1572
PatchVendor Advisory
vupen.com / english/advisories/2009/2152