CVE-2004-0872: Opera Browser

Medium severity, CVSS 5.0. EPSS: 2.7% chance of exploitation in the next 30 days.

Opera does not prevent cookies that are sent over an insecure channel (HTTP) from also being sent over a secure channel (HTTPS/SSL) in the same domain, which could allow remote attackers to steal cookies and conduct unauthorized activities, aka "Cross Security Boundary Cookie Injection."

Affected products

• Opera Opera Browser: version 7.51 only

Published 2004-09-16. Last modified 2026-06-16.