CVE-2004-1380: Mozilla Firefox

Medium severity, CVSS 5.0. EPSS: 3.7% chance of exploitation in the next 30 days.

Firefox before 1.0 and Mozilla before 1.7.5 allows inactive (background) tabs to launch dialog boxes, which can allow remote attackers to spoof the dialog boxes from web sites in other windows and facilitate phishing attacks, aka the "Dialog Box Spoofing Vulnerability."

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: any version; version 1.3 only; version 1.4 only; version 1.4.1 only; version 1.5 only; version 1.5.1 only; …

Published 2004-10-20. Last modified 2026-06-16.