CVE-2014-1500: Mozilla Firefox

Medium severity, CVSS 5.0. EPSS: 3.6% chance of exploitation in the next 30 days.

Mozilla Firefox before 28.0 and SeaMonkey before 2.25 allow remote attackers to cause a denial of service (resource consumption and application hang) via onbeforeunload events that trigger background JavaScript execution.

Affected products

• Mozilla Firefox: before 28.0 (fixed in 28.0)
• Mozilla Seamonkey: before 2.25 (fixed in 2.25)
• Opensuse Opensuse: version 13.1 only
• Opensuse Project Opensuse: version 11.4 only; version 12.3 only
• Oracle Solaris: version 11.3 only
• Suse Linux Enterprise Desktop: version 11 only
• Suse Linux Enterprise Server: version 11 only
• Suse Linux Enterprise Software Development Kit: version 11 only

Published 2014-03-19. Last modified 2026-06-17.