[LEGIT] Fix - HTTP request redirections should not be open to forging attacks

[eli-tamarkin-legit]

🔍 The problem

Change this code to not perform redirects based on user-controlled data.
See issue in Legit

🔒 Fix Details

The vulnerability is due to an open redirect on line 72 where the redirect URL is taken directly from user-controlled query parameters without validation. To fix this, we validate the redirect URL against a whitelist of allowed paths to prevent open redirect attacks. If the URL is not in the whitelist, we redirect to a safe default page (e.g., '/dashboard'). This approach avoids introducing new dependencies and ensures only safe redirects occur.

--- a/app/routes/index.js
+++ b/app/routes/index.js
@@ -70,6 +70,13 @@
     app.get("/learn", isLoggedIn, (req, res) => {
         // Insecure way to handle redirects by taking redirect url from query string
         return res.redirect(req.query.url);
+        const allowedRedirects = ['/dashboard', '/profile', '/benefits', '/contributions'];
+        const redirectUrl = req.query.url;
+        if (allowedRedirects.includes(redirectUrl)) {
+            return res.redirect(redirectUrl);
+        } else {
+            return res.redirect('/dashboard');
+        }
     });
 
     // Handle redirect for learning resources link

[sonarqubecloud]

Quality Gate failed

Failed conditions
C Reliability Rating on New Code (required ≥ A)

See analysis details on SonarQube Cloud

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