CVE-2012-3984: Canonical Ubuntu Linux

Medium severity, CVSS 6.8. EPSS: 2.2% chance of exploitation in the next 30 days.

Mozilla Firefox before 16.0, Thunderbird before 16.0, and SeaMonkey before 2.13 do not properly handle navigation away from a web page that has a SELECT element's menu active, which allows remote attackers to spoof page content via vectors involving absolute positioning and scrolling.

Affected products

• Canonical Ubuntu Linux: version 10.04 only; version 11.04 only; version 11.10 only; version 12.04 only
• Mozilla Firefox: before 16.0 (fixed in 16.0)
• Mozilla Seamonkey: before 2.13 (fixed in 2.13)
• Mozilla Thunderbird: before 16.0 (fixed in 16.0)
• Suse Linux Enterprise Desktop: version 10 only; version 11 only
• Suse Linux Enterprise Server: version 10 only; version 11 only

Published 2012-10-10. Last modified 2026-06-16.