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CVE-2006-1731

Mozilla Firefox and Thunderbird 1.x before 1.5 and 1.0.x before 1.0.8, Mozilla Suite before 1.7...

4.3 MediumFix available

Mozilla Firefox and Thunderbird 1.x before 1.5 and 1.0.x before 1.0.8, Mozilla Suite before 1.7.13, and SeaMonkey before 1.0 returns the Object class prototype instead of the global window object when (1) .valueOf.call or (2) .valueOf.apply are called without any arguments, which allows remote attackers to conduct cross-site scripting (XSS) attacks.

Exploit likelihood

1.82%Down 2.1 points since Feb 4, 2022
90%50%10%1%

What each source reports

NVD Score used 4.3

Mozilla Firefox and Thunderbird 1.x before 1.5 and 1.0.x before 1.0.8, Mozilla Suite before 1.7.13, and SeaMonkey before 1.0 returns the Object class prototype instead of the global window object when (1) .valueOf.call or (2) .valueOf.apply are called without any arguments, which allows remote attackers to conduct cross-site scripting (XSS) attacks.

Record
CVE-2006-1731
CVSS 2.0
4.3 MediumAV:N/AC:M/Au:N/C:N/I:P/A:N
Weakness
CWE-79
Updated
2026-11-02
CVE List No score

Mozilla Firefox and Thunderbird 1.x before 1.5 and 1.0.x before 1.0.8, Mozilla Suite before 1.7.13, and SeaMonkey before 1.0 returns the Object class prototype instead of the global window object when (1) .valueOf.call or (2) .valueOf.apply are called without any arguments, which allows remote attackers to conduct cross-site scripting (XSS) attacks.

Record
CVE-2006-1731
Updated
2026-11-02
EUVDEUVD-2006-1731 No score

Mozilla Firefox and Thunderbird 1.x before 1.5 and 1.0.x before 1.0.8, Mozilla Suite before 1.7.13, and SeaMonkey before 1.0 returns the Object class prototype instead of the global window object when (1) .valueOf.call or (2) .valueOf.apply are called without any arguments, which allows remote attackers to conduct cross-site scripting (XSS) attacks.

Record
EUVD-2006-1731
Updated
2026-11-03
GitHub AdvisoriesGHSA-5g37-6qw5-9qqj No score

Mozilla Firefox and Thunderbird 1.x before 1.5 and 1.0.x before 1.0.8, Mozilla Suite before 1.7...

Mozilla Firefox and Thunderbird 1.x before 1.5 and 1.0.x before 1.0.8, Mozilla Suite before 1.7.13, and SeaMonkey before 1.0 returns the Object class prototype instead of the global window object when (1) .valueOf.call or (2) .valueOf.apply are called without any arguments, which allows remote attackers to conduct cross-site scripting (XSS) attacks.

Record
GHSA-5g37-6qw5-9qqj
Weakness
CWE-79
Updated
2026-11-02
OSV No score

Mozilla Firefox and Thunderbird 1.x before 1.5 and 1.0.x before 1.0.8, Mozilla Suite before 1.7.13, and SeaMonkey before 1.0 returns the Object class prototype instead of the global window object when (1) .valueOf.call or (2) .valueOf.apply are called without any arguments, which allows remote attackers to conduct cross-site scripting (XSS) attacks.

Record
CVE-2006-1731
Updated
2026-11-02
OSVDEBIAN-CVE-2006-1731 No score

Mozilla Firefox and Thunderbird 1.x before 1.5 and 1.0.x before 1.0.8, Mozilla Suite before 1.7.13, and SeaMonkey before 1.0 returns the Object class prototype instead of the global window object when (1) .valueOf.call or (2) .valueOf.apply are called without any arguments, which allows remote attackers to conduct cross-site scripting (XSS) attacks.

Record
DEBIAN-CVE-2006-1731
Updated
2026-11-02

Affected products

Affected packages

Affected packages
PackageAffectedFixed
thunderbird
Debian:12
 before 1.5.0.2-1
1.5.0.2-1
thunderbird
Debian:13
 before 1.5.0.2-1
1.5.0.2-1
thunderbird
Debian:14
 before 1.5.0.2-1
1.5.0.2-1
mozilla-firefox
Debian:3.1
From an advisory covering 23 CVEs
 before 1.0.4-2sarge6, plus listed versions
1.0.4-21.0.4-2sarge11.0.4-2sarge21.0.4-2sarge31.0.4-2sarge41.0.4-2sarge5
1.0.4-2sarge6
mozilla
Debian:3.1
From an advisory covering 31 CVEs
 before 2:1.7.8-1sarge5, plus listed versions
2:1.7.8-12:1.7.8-1sarge12:1.7.8-1sarge22:1.7.8-1sarge3
2:1.7.8-1sarge5
mozilla-thunderbird
Debian:3.1
From an advisory covering 28 CVEs
 before 1.0.2-2.sarge1.0.8, plus listed versions
1.0.2-21.0.2-2.sarge1.0.61.0.2-2.sarge1.0.7
1.0.2-2.sarge1.0.8
firefox
Red Hat:enterprise_linux:4::as
From an advisory covering 19 CVEs
 before 0:1.0.8-1.4.1
0:1.0.8-1.4.1
firefox-debuginfo
Red Hat:enterprise_linux:4::as
From an advisory covering 19 CVEs
 before 0:1.0.8-1.4.1
0:1.0.8-1.4.1
firefox
Red Hat:enterprise_linux:4::desktop
From an advisory covering 19 CVEs
 before 0:1.0.8-1.4.1
0:1.0.8-1.4.1
firefox-debuginfo
Red Hat:enterprise_linux:4::desktop
From an advisory covering 19 CVEs
 before 0:1.0.8-1.4.1
0:1.0.8-1.4.1
Show 24 moreShow less
Affected packages
PackageAffectedFixed
firefox
Red Hat:enterprise_linux:4::es
From an advisory covering 19 CVEs
 before 0:1.0.8-1.4.1
0:1.0.8-1.4.1
firefox-debuginfo
Red Hat:enterprise_linux:4::es
From an advisory covering 19 CVEs
 before 0:1.0.8-1.4.1
0:1.0.8-1.4.1
firefox
Red Hat:enterprise_linux:4::ws
From an advisory covering 19 CVEs
 before 0:1.0.8-1.4.1
0:1.0.8-1.4.1
firefox-debuginfo
Red Hat:enterprise_linux:4::ws
From an advisory covering 19 CVEs
 before 0:1.0.8-1.4.1
0:1.0.8-1.4.1
devhelp
Red Hat:enterprise_linux:4::as
From an advisory covering 20 CVEs
 before 0:0.9.2-2.4.8
0:0.9.2-2.4.8
devhelp-debuginfo
Red Hat:enterprise_linux:4::as
From an advisory covering 20 CVEs
 before 0:0.9.2-2.4.8
0:0.9.2-2.4.8
devhelp-devel
Red Hat:enterprise_linux:4::as
From an advisory covering 20 CVEs
 before 0:0.9.2-2.4.8
0:0.9.2-2.4.8
devhelp
Red Hat:enterprise_linux:4::desktop
From an advisory covering 20 CVEs
 before 0:0.9.2-2.4.8
0:0.9.2-2.4.8
devhelp-debuginfo
Red Hat:enterprise_linux:4::desktop
From an advisory covering 20 CVEs
 before 0:0.9.2-2.4.8
0:0.9.2-2.4.8
devhelp-devel
Red Hat:enterprise_linux:4::desktop
From an advisory covering 20 CVEs
 before 0:0.9.2-2.4.8
0:0.9.2-2.4.8
devhelp
Red Hat:enterprise_linux:4::es
From an advisory covering 20 CVEs
 before 0:0.9.2-2.4.8
0:0.9.2-2.4.8
devhelp-debuginfo
Red Hat:enterprise_linux:4::es
From an advisory covering 20 CVEs
 before 0:0.9.2-2.4.8
0:0.9.2-2.4.8
devhelp-devel
Red Hat:enterprise_linux:4::es
From an advisory covering 20 CVEs
 before 0:0.9.2-2.4.8
0:0.9.2-2.4.8
devhelp
Red Hat:enterprise_linux:4::ws
From an advisory covering 20 CVEs
 before 0:0.9.2-2.4.8
0:0.9.2-2.4.8
devhelp-debuginfo
Red Hat:enterprise_linux:4::ws
From an advisory covering 20 CVEs
 before 0:0.9.2-2.4.8
0:0.9.2-2.4.8
devhelp-devel
Red Hat:enterprise_linux:4::ws
From an advisory covering 20 CVEs
 before 0:0.9.2-2.4.8
0:0.9.2-2.4.8
thunderbird
Red Hat:enterprise_linux:4::as
From an advisory covering 21 CVEs
 before 0:1.0.8-1.4.1
0:1.0.8-1.4.1
thunderbird-debuginfo
Red Hat:enterprise_linux:4::as
From an advisory covering 21 CVEs
 before 0:1.0.8-1.4.1
0:1.0.8-1.4.1
thunderbird
Red Hat:enterprise_linux:4::desktop
From an advisory covering 21 CVEs
 before 0:1.0.8-1.4.1
0:1.0.8-1.4.1
thunderbird-debuginfo
Red Hat:enterprise_linux:4::desktop
From an advisory covering 21 CVEs
 before 0:1.0.8-1.4.1
0:1.0.8-1.4.1
thunderbird
Red Hat:enterprise_linux:4::es
From an advisory covering 21 CVEs
 before 0:1.0.8-1.4.1
0:1.0.8-1.4.1
thunderbird-debuginfo
Red Hat:enterprise_linux:4::es
From an advisory covering 21 CVEs
 before 0:1.0.8-1.4.1
0:1.0.8-1.4.1
thunderbird
Red Hat:enterprise_linux:4::ws
From an advisory covering 21 CVEs
 before 0:1.0.8-1.4.1
0:1.0.8-1.4.1
thunderbird-debuginfo
Red Hat:enterprise_linux:4::ws
From an advisory covering 21 CVEs
 before 0:1.0.8-1.4.1
0:1.0.8-1.4.1

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-2006-1731 is a medium vulnerability (CVSS 4.3) in Mozilla Firefox, published April 14, 2006. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 1.82%, the 78th percentile. Fixed in thunderbird 1.5.0.2-1.

References

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Left out here: 8 references. The JSON record has them.

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