Lab: Remote code execution via web shell upload — PortSwigger Web Security Academy

📰 Medium · Cybersecurity

Learn how to exploit a vulnerable file upload function to achieve remote code execution via web shell upload

advanced Published 25 Jun 2026
Action Steps
  1. Identify a vulnerable file upload function using a web application scanner or manual testing
  2. Upload a malicious web shell to the vulnerable server using a tool like Burp Suite
  3. Configure the web shell to execute system commands and gain remote code execution
  4. Test the web shell by executing a system command and verifying the output
  5. Apply this knowledge to real-world scenarios by testing file upload functions in web applications
Who Needs to Know This

Security teams and penetration testers can benefit from this lab to improve their skills in identifying and exploiting vulnerable file upload functions

Key Insight

💡 Vulnerable file upload functions can be exploited to achieve remote code execution, emphasizing the importance of input validation and secure coding practices

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🚨 Exploit vulnerable file upload functions to achieve remote code execution via web shell upload 🚨

Full Article

This lab contains a vulnerable file upload function that does not perform any validation on the files being uploaded. Normally, a secure… Continue reading on Medium »
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