CVE-2005-1153: Mozilla Firefox

High severity, CVSS 7.5. EPSS: 3.6% chance of exploitation in the next 30 days.

Firefox before 1.0.3 and Mozilla Suite before 1.7.7, when blocking a popup, allows remote attackers to execute arbitrary code via a javascript: URL that is executed when the user selects the "Show javascript" option.

Affected products

• Mozilla Firefox: version 0.8 only; version 0.9 only; version 0.9.1 only; version 0.9.2 only; version 0.9.3 only; version 0.10 only; …
• Mozilla Mozilla: version 1.3 only; version 1.4 only; version 1.4.1 only; version 1.5 only; version 1.5.1 only; version 1.6 only; …

Published 2005-05-02. Last modified 2026-06-16.