CVE-2004-1133: Microsoft w3who.dll

Medium severity, CVSS 6.8. EPSS: 9.8% chance of exploitation in the next 30 days.

Multiple cross-site scripting (XSS) vulnerabilities in Microsoft W3Who ISAPI (w3who.dll) allow remote attackers to inject arbitrary HTML and web script via (1) HTTP headers such as "Connection" or (2) invalid parameters whose values are echoed in the resulting error message.

Affected products

• Microsoft w3who.dll: any version

Published 2005-01-10. Last modified 2026-06-16.