CVE-2008-3837: Canonical Ubuntu Linux

High severity, CVSS 9.3. EPSS: 3.3% chance of exploitation in the next 30 days.

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.

Affected products

• Canonical Ubuntu Linux: version 6.06 only; version 7.04 only; version 7.10 only; version 8.04 only
• Debian Debian Linux: version 4.0 only
• Mozilla Firefox: before 2.0.0.17 (fixed in 2.0.0.17); from 3.0, before 3.0.2 (fixed in 3.0.2)
• Mozilla Seamonkey: before 1.1.12 (fixed in 1.1.12)

Published 2008-09-24. Last modified 2026-06-16.