Testing scripts that interact with local assets.

In URL encoding, : // becomes %3A%2F%2F . Triple slashes ( /// ) are used to denote an absolute path on a Linux-based system. 4. Exploitation Steps

Thus the full decoded string is: fetch-url-file:///

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// Assuming you have a function fetchUrl that interprets custom protocols function fetchUrl(urlString) if (urlString.startsWith('file:///')) const filePath = urlString.slice('file://'.length); // leaves '///path' // In a secure desktop app (Electron, NW.js, or Node), you could read the file console.log(`Attempting to read local file: $filePath`); // Actual file read would go here

If your goal is to , here are correct, modern approaches: