File upload means sending a file from a local system to a remote system such as a server or another client with the intent that the remote system should store a copy of the file being transferred.

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Getting the uploaded file path without knowing the uploading destination

Imagine a scenario that we are able to upload a PHP file on the server. However, we are not aware of the uploading path. I simply mean that, we are able to upload the file but we don't know where it ...
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Simple method requiring no installation of special tools to share a file over the internet

I have searched for related topics, but found other existing answers to not be satisfactory, because they require installing special tools. This is a very common use case. For example, I want to ...
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Securing server from attacks and linking while allowing users to upload and store personal files?

I have read some questions and answers about uploading images specifically: Have I done enough not be compromised through image uploading Risks of a php image upload form Uploading images safe of ...
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Potential security issues in a two-part upload process

I use a pre-signed URL approach for uploading files to a private S3 bucket. A CloudFront distribution is configured to use this bucket as the source. The upload process is only available to ...
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Bypassing Change Name Uploader

I have read all of the questions available on SE about bypassing the change name uploader. Consider an uploader which changes the file name each time you try to upload a file. The only allowed formats ...