CVE-2005-1664: Microsoft ASP.NET

Medium severity, CVSS 6.4. EPSS: 18.8% chance of exploitation in the next 30 days.

The __VIEWSTATE functionality in Microsoft ASP.NET 1.x allows remote attackers to conduct replay attacks to (1) apply a ViewState generated from one view to a different view, (2) reuse ViewState information after the application's state has changed, or (3) use the ViewState to conduct attacks or expose content to third parties.

Affected products

• Microsoft ASP.NET: version 1.0 only; version 1.1 only

Published 2005-05-18. Last modified 2026-06-16.