Copilotfree, in-browser
Ask me anything about your lessons or your code.
“What is a port?” · “Why is my code erroring?”
Ask me anything about your lessons or your code.
“What is a port?” · “Why is my code erroring?”
An app builds a file path out of user input, so input like ../../../../etc/passwd climbs out of the intended folder and reads files elsewhere on the server. The ../ means 'go up one directory', repeated until it hits the top.