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The most immediate vulnerability of the X-AspNet-Version header is Information Disclosure (CWE-200). x-aspnet-version 4.0.3 vulnerabilities
This vulnerability allowed attackers to bypass the Request Validation feature (which blocks malicious input like <script> ). : The most immediate vulnerability of the X-AspNet-Version
The X-AspNet-Version: 4.0.30319 header is , but it is a powerful reconnaissance tool that lowers the barrier to exploiting real vulnerabilities like view state deserialization and padding oracle attacks. Removing the header is a low-effort, high-value security hardening measure. Organizations still exposing this header on production ASP.NET applications should prioritize its removal and conduct a full security review of their .NET runtime configuration. ). The X-AspNet-Version: 4.0.30319 header is
An attacker can automate scanning for X-AspNet-Version: 4.0.30319 to: