Collected research

Exploiting ASP.NET TemplateParser — Part I

Exploiting ASP.NET TemplateParser — Part I: Sitecore (CVE-2023-35813)

Markus Wulftange · Code White

The ASP.NET Web Forms TemplateParser, fed attacker-controlled markup through ParseControl, instantiates arbitrary types with a public parameterless constructor and drives arbitrary property setters along property paths, before any compilation. Sitecore exposed ParseControl over an AJAX handler, so AssemblyInstaller gave remote code execution and RemotingService leaked connection strings.

Record

Document

Exploiting ASP.NET TemplateParser — Part I: Sitecore (CVE-2023-35813)

Researcher

Markus Wulftange

Published by

Code White

Topic

Injection

In the archive

• Collected in the 2023 research round

Related sources

• Exploiting ASP.NET TemplateParser — Part II: SharePoint (CVE-2023-33160)
• A Security Review of SharePoint Site Pages
• Room for Escape: Scribbling Outside the Lines of Template Security Whitepaper

Tags

• aspnet
• dotnet
• gadget-chain
• rce
• ssti
• deserialization
• info-leak
• cve
• owasp-a03-2021
• owasp-a08-2021

This page is the archive's own catalogue record. The research is the work of Markus Wulftange, first published at the original source. Preserved copies are kept so the citation survives its host; this one was last captured on 28 August 2026.