Juice Shop Ssrf Apr 2026

); );

http://localhost:3000/solve/challenge/ssrf

Introduction: The Silent Proxy Server-Side Request Forgery (SSRF) is often called the "forgotten twin" of Cross-Site Request Forgery (CSRF). While CSRF tricks a user's browser , SSRF tricks the server itself . An SSRF vulnerability allows an attacker to induce the server to make HTTP requests to an arbitrary domain of the attacker's choosing. juice shop ssrf

// 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 the real SSRF is not directly in the Order ID. It's in the or "Complaint" feature, depending on the version. In the standard Juice Shop SSRF challenge, the vulnerable endpoint is: // Vulnerable code example (simplified from Juice Shop

Inspecting the network traffic reveals that the server makes a backend request to: https://maps.googleapis.com/maps/api/staticmap?center=...

Or more classically: The functionality, where you provide a URL to an image of your broken juice. The server tries to fetch that image to validate it. The Vulnerability: Unvalidated URL Fetching Let's look at the pseudo-code of the vulnerable endpoint: In the standard Juice Shop SSRF challenge, the

POST /api/ImageUploads

The critical mistake: . Exploitation: The Juice Shop SSRF Challenge To solve the Juice Shop SSRF challenge (usually titled "Who's the real unicorn?" or "SSRF – Request Bomb"), you must make the server fetch a resource from a location it shouldn't. Step 1: Reconnaissance with Localhost First, test if the server will fetch from localhost . Use Burp Suite or your browser's developer tools to intercept the image upload request.

Juice Shop downloads this image server-side and then serves it to the client. The parameter center (the address) is partially user-influenced via the order database.

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: