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  1. Web Security Academy
  2. File upload vulnerabilities
  3. Lab

Lab: Web shell upload via Content-Type restriction bypass

APPRENTICE

This lab contains a vulnerable image upload function. It attempts to prevent users from uploading unexpected file types, but relies on checking user-controllable input to verify this.

To solve the lab, upload a basic PHP web shell and use it to exfiltrate the contents of the file /home/carlos/secret. Submit this secret using the button provided in the lab banner.

You can log in to your own account using the following credentials: wiener:peter

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