POST /upload/async 202 Accepted Location: /upload/status/abc123
req.safeFile = buffer: req.file.buffer, name: newName, mime: type.mime ; next(); fileupload gunner project
(React example)
: Replacing legitimate website files with unauthorized content. Share your evasion stories and hardening tips in
: Platforms like Contentstack allow you to deploy an entire project simply by uploading a ZIP file containing your source code. express-fileupload · GitHub Topics fileupload gunner project
Have you implemented the FileUpload Gunner Project in your stack? Share your evasion stories and hardening tips in the comments below.
| Traditional Approach | Vulnerability | Gunner Project Mitigation | |----------------------|---------------|----------------------------| | Trust Content-Type header | Attacker sends image/jpeg with PHP code | Re-validate using fileinfo or magic database | | Block .php but allow .php3 or .phtml | Extension blacklisting is incomplete | Whitelist ONLY safe extensions ( .jpg , .pdf , .txt ) | | Store in /uploads/ | Direct access leads to RCE | Store outside webroot with a secure download proxy |
POST /upload/async 202 Accepted Location: /upload/status/abc123
req.safeFile = buffer: req.file.buffer, name: newName, mime: type.mime ; next();
(React example)
: Replacing legitimate website files with unauthorized content.
: Platforms like Contentstack allow you to deploy an entire project simply by uploading a ZIP file containing your source code. express-fileupload · GitHub Topics
Have you implemented the FileUpload Gunner Project in your stack? Share your evasion stories and hardening tips in the comments below.
| Traditional Approach | Vulnerability | Gunner Project Mitigation | |----------------------|---------------|----------------------------| | Trust Content-Type header | Attacker sends image/jpeg with PHP code | Re-validate using fileinfo or magic database | | Block .php but allow .php3 or .phtml | Extension blacklisting is incomplete | Whitelist ONLY safe extensions ( .jpg , .pdf , .txt ) | | Store in /uploads/ | Direct access leads to RCE | Store outside webroot with a secure download proxy |
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