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[Security] How do you filter the files uploaded by users to your web app?

Deactivated User's photo
Deactivated User
·Sep 19, 2016

There are lots of ways to filter the file uploaded to your app. Some of those were done properly but few were not. I don't know if most of devs here cares about the security of their app. Most of the time, I always detect someone uploading an executable file such as SVG, XML, PHP and etc. They might have bypasses, techniques or other ways to successfully uploaded the malicious file. So, I'd like to ask you about this. Kindly share how you filter, secure, and protect your app and users from intruders.