CVE-2003-0593: Opera Browser

High severity, CVSS 7.5. EPSS: 2.9% chance of exploitation in the next 30 days.

Opera allows remote attackers to bypass intended cookie access restrictions on a web application via "%2e%2e" (encoded dot dot) directory traversal sequences in a URL, which causes Opera to send the cookie outside the specified URL subsets, e.g. to a vulnerable application that runs on the same server as the target application.

Affected products

• Opera Opera Browser: version 5.0 only; version 5.02 only; version 5.10 only; version 5.11 only; version 5.12 only; version 6.0 only; …

Published 2004-04-15. Last modified 2026-06-16.