CVE-2005-2678: Microsoft Internet Information Server

Medium severity, CVSS 5.0. EPSS: 41.8% chance of exploitation in the next 30 days.

Microsoft IIS 5.1 and 6 allows remote attackers to spoof the SERVER_NAME variable to bypass security checks and conduct various attacks via a GET request with an http://localhost URI, which makes it appear as if the request is coming from localhost.

Affected products

• Microsoft Internet Information Server: version 6.0 only
• Microsoft Internet Information Services: version 5.0 only

Published 2005-08-23. Last modified 2026-06-16.