CVE-2003-0513: Microsoft Ie

High severity, CVSS 7.5. EPSS: 9.8% chance of exploitation in the next 30 days.

Microsoft Internet Explorer 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 Internet Explorer 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

• Microsoft Ie: version 6.0 only
• Microsoft Internet Explorer: version 5.0.1 only; version 5.5 only; version 6.0 only

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