CVE-2005-0456: Opera Browser

Medium severity, CVSS 5.0. EPSS: 3.4% chance of exploitation in the next 30 days.

Opera 7.54 and earlier does not properly validate base64 encoded binary data in a data: (RFC 2397) URL, which causes the URL to be obscured in a download dialog, which may allow remote attackers to trick users into executing arbitrary code.

Affected products

• Opera Opera Browser: up to and including 7.54

Published 2005-01-12. Last modified 2026-06-16.