CVE-2014-1539: Mozilla Firefox

Medium severity, CVSS 5.0. EPSS: 2.2% chance of exploitation in the next 30 days.

Mozilla Firefox before 30.0 and Thunderbird through 24.6 on OS X do not ensure visibility of the cursor after interaction with a Flash object and a DIV element, which makes it easier for remote attackers to conduct clickjacking attacks via JavaScript code that produces a fake cursor image.

Affected products

• Mozilla Firefox: up to and including 29.0.1
• Mozilla Thunderbird: up to and including 24.6; version 24.0 only; version 24.0.1 only; version 24.1 only; version 24.1.1 only; version 24.2 only; …

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