CVE-2012-3555: Opera Browser

High severity, CVSS 7.6. EPSS: 3.8% chance of exploitation in the next 30 days.

Opera before 11.65 does not ensure that keyboard sequences are associated with a visible window, which makes it easier for user-assisted remote attackers to conduct cross-site scripting (XSS) attacks or execute arbitrary code via a crafted web site, related to a "hidden keyboard navigation" issue.

Affected products

• Opera Opera Browser: up to and including 11.62; version 5.0 only; version 5.02 only; version 5.10 only; version 5.11 only; version 5.12 only; …

Published 2012-06-14. Last modified 2026-06-16.