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CVE-2009-1840

Mozilla Firefox before 3.0.11, Thunderbird, and SeaMonkey do not check content policy before...

9.3 High

Mozilla Firefox before 3.0.11, Thunderbird, and SeaMonkey do not check content policy before loading a script file into a XUL document, which allows remote attackers to bypass intended access restrictions via a crafted HTML document, as demonstrated by a "web bug" in an e-mail message, or web script or an advertisement in a web page.

Exploit likelihood

2.22%Down 1.7 points since Feb 4, 2022
90%50%10%1%

What each source reports

NVD Score used 9.3

Mozilla Firefox before 3.0.11, Thunderbird, and SeaMonkey do not check content policy before loading a script file into a XUL document, which allows remote attackers to bypass intended access restrictions via a crafted HTML document, as demonstrated by a "web bug" in an e-mail message, or web script or an advertisement in a web page.

Record
CVE-2009-1840
CVSS 2.0
9.3 HighAV:N/AC:M/Au:N/C:C/I:C/A:C
Weakness
CWE-264
Updated
2026-11-02
CVE List No score

Mozilla Firefox before 3.0.11, Thunderbird, and SeaMonkey do not check content policy before loading a script file into a XUL document, which allows remote attackers to bypass intended access restrictions via a crafted HTML document, as demonstrated by a "web bug" in an e-mail message, or web script or an advertisement in a web page.

Record
CVE-2009-1840
Updated
2026-11-02
EUVDEUVD-2009-1835 No score

Mozilla Firefox before 3.0.11, Thunderbird, and SeaMonkey do not check content policy before loading a script file into a XUL document, which allows remote attackers to bypass intended access restrictions via a crafted HTML document, as demonstrated by a "web bug" in an e-mail message, or web script or an advertisement in a web page.

Record
EUVD-2009-1835
Updated
2026-11-03
GitHub AdvisoriesGHSA-qvp9-wp54-hp75 No score

Mozilla Firefox before 3.0.11, Thunderbird, and SeaMonkey do not check content policy before...

Mozilla Firefox before 3.0.11, Thunderbird, and SeaMonkey do not check content policy before loading a script file into a XUL document, which allows remote attackers to bypass intended access restrictions via a crafted HTML document, as demonstrated by a "web bug" in an e-mail message, or web script or an advertisement in a web page.

Record
GHSA-qvp9-wp54-hp75
Updated
2026-11-02

Affected products

Affected packages

Affected packages
PackageAffectedFixed
xulrunner
Debian:5.0
From an advisory covering 12 CVEs
 before 1.9.0.11-0lenny1, plus listed versions
1.9.0.10-11.9.0.5-11.9.0.6-11.9.0.7-0lenny11.9.0.7-0lenny2
Show 4 moreShow less
1.9.0.7-11.9.0.8-11.9.0.9-0lenny21.9.0.9-1
1.9.0.11-0lenny1
firefox
Red Hat:enterprise_linux:4::as
From an advisory covering 11 CVEs
 before 0:3.0.11-4.el4
0:3.0.11-4.el4
firefox-debuginfo
Red Hat:enterprise_linux:4::as
From an advisory covering 11 CVEs
 before 0:3.0.11-4.el4
0:3.0.11-4.el4
firefox
Red Hat:enterprise_linux:4::desktop
From an advisory covering 11 CVEs
 before 0:3.0.11-4.el4
0:3.0.11-4.el4
firefox-debuginfo
Red Hat:enterprise_linux:4::desktop
From an advisory covering 11 CVEs
 before 0:3.0.11-4.el4
0:3.0.11-4.el4
firefox
Red Hat:enterprise_linux:4::es
From an advisory covering 11 CVEs
 before 0:3.0.11-4.el4
0:3.0.11-4.el4
firefox-debuginfo
Red Hat:enterprise_linux:4::es
From an advisory covering 11 CVEs
 before 0:3.0.11-4.el4
0:3.0.11-4.el4
firefox
Red Hat:enterprise_linux:4::ws
From an advisory covering 11 CVEs
 before 0:3.0.11-4.el4
0:3.0.11-4.el4
firefox-debuginfo
Red Hat:enterprise_linux:4::ws
From an advisory covering 11 CVEs
 before 0:3.0.11-4.el4
0:3.0.11-4.el4
xulrunner
Red Hat:enterprise_linux:5::client_workstation
From an advisory covering 11 CVEs
 before 0:1.9.0.11-3.el5_3
0:1.9.0.11-3.el5_3
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Affected packages
PackageAffectedFixed
xulrunner-debuginfo
Red Hat:enterprise_linux:5::client_workstation
From an advisory covering 11 CVEs
 before 0:1.9.0.11-3.el5_3
0:1.9.0.11-3.el5_3
xulrunner-devel
Red Hat:enterprise_linux:5::client_workstation
From an advisory covering 11 CVEs
 before 0:1.9.0.11-3.el5_3
0:1.9.0.11-3.el5_3
xulrunner-devel-unstable
Red Hat:enterprise_linux:5::client_workstation
From an advisory covering 11 CVEs
 before 0:1.9.0.11-3.el5_3
0:1.9.0.11-3.el5_3
firefox
Red Hat:enterprise_linux:5::client
From an advisory covering 11 CVEs
 before 0:3.0.11-2.el5_3
0:3.0.11-2.el5_3
firefox-debuginfo
Red Hat:enterprise_linux:5::client
From an advisory covering 11 CVEs
 before 0:3.0.11-2.el5_3
0:3.0.11-2.el5_3
xulrunner
Red Hat:enterprise_linux:5::client
From an advisory covering 11 CVEs
 before 0:1.9.0.11-3.el5_3
0:1.9.0.11-3.el5_3
xulrunner-debuginfo
Red Hat:enterprise_linux:5::client
From an advisory covering 11 CVEs
 before 0:1.9.0.11-3.el5_3
0:1.9.0.11-3.el5_3
firefox
Red Hat:enterprise_linux:5::server
From an advisory covering 11 CVEs
 before 0:3.0.11-2.el5_3
0:3.0.11-2.el5_3
firefox-debuginfo
Red Hat:enterprise_linux:5::server
From an advisory covering 11 CVEs
 before 0:3.0.11-2.el5_3
0:3.0.11-2.el5_3
xulrunner
Red Hat:enterprise_linux:5::server
From an advisory covering 11 CVEs
 before 0:1.9.0.11-3.el5_3
0:1.9.0.11-3.el5_3
xulrunner-debuginfo
Red Hat:enterprise_linux:5::server
From an advisory covering 11 CVEs
 before 0:1.9.0.11-3.el5_3
0:1.9.0.11-3.el5_3
xulrunner-devel
Red Hat:enterprise_linux:5::server
From an advisory covering 11 CVEs
 before 0:1.9.0.11-3.el5_3
0:1.9.0.11-3.el5_3
xulrunner-devel-unstable
Red Hat:enterprise_linux:5::server
From an advisory covering 11 CVEs
 before 0:1.9.0.11-3.el5_3
0:1.9.0.11-3.el5_3

History

History
RecordedChangedSources
affected, facts
aliasesEUVD
first indexedCVE List, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2009-1840 is a high vulnerability (CVSS 9.3) in Mozilla Firefox, published June 12, 2009. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 2.22%, the 82nd percentile. No source names a fixed version.

References

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