CVE-2004-1156: Mozilla Firefox

Medium severity, CVSS 4.3. EPSS: 1.4% chance of exploitation in the next 30 days.

Mozilla before 1.7.6, and Firefox before 1.0.1, allows remote attackers to spoof arbitrary web sites by injecting content from one window into a target window whose name is known but resides in a different domain, as demonstrated using a pop-up window on a trusted web site, aka the "window injection" 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: version 0.8 only; version 0.9.2 only; version 0.9.2.1 only; version 0.9.3 only; version 0.9.4 only; version 0.9.4.1 only; …

Published 2004-12-31. Last modified 2026-06-16.