CVE-2013-5593: Mozilla Firefox

Medium severity, CVSS 4.3. EPSS: 2% chance of exploitation in the next 30 days.

The SELECT element implementation in Mozilla Firefox before 25.0, Firefox ESR 24.x before 24.1, Thunderbird before 24.1, and SeaMonkey before 2.22 does not properly restrict the nature or placement of HTML within a dropdown menu, which allows remote attackers to spoof the address bar or conduct clickjacking attacks via vectors that trigger navigation off of a page containing this element.

Affected products

• Mozilla Firefox: version 24.0 only; version 24.0.1 only; version 24.0.2 only; up to and including 24.0; version 19.0 only; version 19.0.1 only; …
• Mozilla Seamonkey: up to and including 2.22; version 2.0 only; version 2.0.1 only; version 2.0.2 only; version 2.0.3 only; version 2.0.4 only; …
• Mozilla Thunderbird: up to and including 24.0.1; version 17.0 only; version 17.0.1 only; version 17.0.2 only; version 17.0.3 only; version 17.0.4 only; …
• Mozilla Thunderbird ESR: version 17.0.9 only

Published 2013-10-30. Last modified 2026-06-16.