CVE-2008-3837

CVE-2008-3837 is a critical-severity vulnerability in Mozilla Firefox with a CVSS 2.0 base score of 9.3. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.

Key facts

Description

Mozilla Firefox before 2.0.0.17 and 3.x before 3.0.2, and SeaMonkey before 1.1.12, allow user-assisted remote attackers to move a window during a mouse click, and possibly force a file download or unspecified other drag-and-drop action, via a crafted onmousedown action that calls window.moveBy, a variant of CVE-2003-0823.

Frequently asked questions

What is CVE-2008-3837?
Mozilla Firefox before 2.0.0.17 and 3.x before 3.0.2, and SeaMonkey before 1.1.12, allow user-assisted remote attackers to move a window during a mouse click, and possibly force a file download or unspecified other drag-and-drop action, via a crafted onmousedown action that calls window.moveBy, a variant of CVE-2003-0823.
How severe is CVE-2008-3837?
CVE-2008-3837 has a CVSS 2.0 base score of 9.3, rated critical severity.
Is CVE-2008-3837 being actively exploited?
It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (87th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2008-3837?
CVE-2008-3837 primarily affects Mozilla Firefox. In total, 7 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2008-3837?
Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2008-3837 published?
CVE-2008-3837 was published on 2008-09-24 and last updated on 2026-06-16.

References

Affected products (7)

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