CVE-2004-1157: Opera Browser

High severity, CVSS 7.5. EPSS: 2.5% chance of exploitation in the next 30 days.

Opera 7.x up to 7.54, and possibly other versions, 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

• Opera Opera Browser: from 7.0, up to and including 7.54

Published 2005-01-10. Last modified 2026-06-16.