CVE-2009-0821: Mozilla Firefox

Medium severity, CVSS 5.0. EPSS: 5.3% chance of exploitation in the next 30 days.

Mozilla Firefox 2.0.0.20 and earlier allows remote attackers to cause a denial of service (application crash) via nested calls to the window.print function, as demonstrated by a window.print(window.print()) in the onclick attribute of an INPUT element.

Affected products

• Mozilla Firefox: up to and including 2.0.0.20; version 0.1 only; version 0.2 only; version 0.3 only; version 0.4 only; version 0.5 only; …

Published 2009-03-05. Last modified 2026-06-16.