CVE-2007-0800: Mozilla Firefox

Medium severity, CVSS 4.3. EPSS: 1.7% chance of exploitation in the next 30 days.

Cross-zone vulnerability in Mozilla Firefox 1.5.0.9 considers blocked popups to have an internal zone origin, which allows user-assisted remote attackers to cross zone restrictions and read arbitrary file:// URIs by convincing a user to show a blocked popup.

Affected products

• Mozilla Firefox: version 1.5.0.9 only

Published 2007-02-07. Last modified 2026-06-16.