CVE-2008-5913: Mozilla Firefox

Medium severity, CVSS 4.9. EPSS: 1.1% chance of exploitation in the next 30 days.

The Math.random function in the JavaScript implementation in Mozilla Firefox 3.5.x before 3.5.10 and 3.6.x before 3.6.4, and SeaMonkey before 2.0.5, uses a random number generator that is seeded only once per browser session, which makes it easier for remote attackers to track a user, or trick a user into acting upon a spoofed pop-up message, by calculating the seed value, related to a "temporary footprint" and an "in-session phishing attack."

Affected products

• Mozilla Firefox: version 3.5 only; version 3.5.1 only; version 3.5.2 only; version 3.5.3 only; version 3.5.4 only; version 3.5.5 only; …
• Mozilla Seamonkey: up to and including 2.0.4; version 1.0 only; version 1.0.1 only; version 1.0.2 only; version 1.0.3 only; version 1.0.4 only; …

Published 2009-01-20. Last modified 2026-06-16.