CVE-2014-1592: Mozilla Firefox

Medium severity, CVSS 6.8. EPSS: 3.4% chance of exploitation in the next 30 days.

Use-after-free vulnerability in the nsHtml5TreeOperation function in xul.dll in Mozilla Firefox before 34.0, Firefox ESR 31.x before 31.3, Thunderbird before 31.3, and SeaMonkey before 2.31 allows remote attackers to execute arbitrary code by adding a second root element to an HTML5 document during parsing.

Affected products

• Mozilla Firefox: up to and including 31.2; up to and including 33.0
• Mozilla Seamonkey: up to and including 2.30
• Mozilla Thunderbird: up to and including 31.2

Published 2014-12-11. Last modified 2026-06-17.