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5.0

Firefox and Thunderbird on macOS allow hidden cursor trick

CVE-2014-1539 · published 12 years ago
Summary

On macOS, older versions of Firefox (before 30) and Thunderbird (through 24.6) may hide the mouse pointer after a user clicks on a Flash object inside a web page. This can be abused to make users think they are clicking something harmless while actually clicking hidden buttons, a technique known as clickjacking. Upgrade to the latest versions of Firefox and Thunderbird or apply any available security patches to restore proper cursor visibility.

What to do

The CVE record does not list a fixed version. Check the vendor's site or the advisory links below - a fix may already be released.

Affected software
VendorProductAffected versions
mozilla firefox <= 29.0.1
cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:*
mozilla thunderbird <= 24.6
24.0
24.0.1
24.1
24.1.1
24.2
24.3
24.4
24.5
cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:*
Original advisory text
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 att...
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.
References
Fix within
Internet-facing 14 days
Internal 60 days
  • Not known to be exploited
  • Can be exploited automatically (estimated)
  • Gives an attacker partial control (estimated)
Severity
5.0 Medium
Exploitation
2% chance of attack within 30 days
Type
CWE-20Improper Input Validation
Timeline
Published11 Jun 2014
Updated4 Nov 2026
First seen29 Sep 2026
Sources
CVE-2014-1539 · NVD
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