CVE-2010-4044: Opera Browser

Medium severity, CVSS 4.3. EPSS: 2% chance of exploitation in the next 30 days.

Opera before 10.63 does not ensure that the portion of a URL shown in the Address Bar contains the beginning of the URL, which allows remote attackers to spoof URLs by changing a window's size.

Affected products

• Opera Opera Browser: up to and including 10.62; version 5.0 only; version 5.02 only; version 5.10 only; version 5.11 only; version 5.12 only; …

Published 2010-10-21. Last modified 2026-06-16.