Web Hacking
Members Only
File Upload Vulnerabilities
How a simple "upload your avatar" feature turns into webshell RCE. Every angle: extension/MIME/magic-byte bypasses, polyglot files (GIF+PHP, PDF+JS, SVG+XSS), the .htaccess and web.config tricks, path traversal, null byte and double extension, the ImageMagick CVEs (ImageTragick), race conditions in upload pipelines, ZipSlip extraction attacks, S3 ACL pitfalls, real incidents, and the eight-layer defence model.
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