Posts on: Iis

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Internet Information Services (IIS) for Windows Server is a flexible, secure and manageable Web server for hosting anything on the Web. From media streaming to web applications, IIS’s scalable and open architecture is ready to handle the most demanding tasks. 2025–2026 context: IIS remains a live attack surface not because of the web server itself, but because of legacy Windows filesystem features it exposes, misconfigured WebDAV, and the ASP.NET ViewState/machineKey ecosystem. The tilde (8.3 short name) disclosure is still being assigned CVEs in 2025 — CVE-2025-46294 covers FileMaker Server’s implementation, rated CVSS 5.3 (CWE-200) — and the real impact is what those short names reveal: hidden upload endpoints, backup files, and configuration files that standard directory brute-forcing never finds.

WebDAV (Web Distributed Authoring and Versioning) is a protocol that extends the HTTP protocol, allowing users to collaboratively author and manage files on a web server, enabling actions like creating, editing, moving, and deleting files remotely. An HTTP Server with WebDav might require valid credentials to perform file operations, such as creating, deleting or editing existing files. The credentials are most probably required via HTTP Basic Authentication. Success Notice: You will need to use the HTTP PUT, DELETE and MOVE verbs to respectively upload, delete and move files. Warning Sometimes, the WebDav instance might be configured to deny any file upload using specific file extensions. If this configuration is not properly set, you might be able to subvert it by uploading the file with any other accepted extension, and then using a move (rename) operation or a copy operation.