I’m developing an application that allows users to log in through Facebook on the frontend, and I receive an access token during this process. I’m curious to know if it’s considered safe to send this token to my backend for further actions.
I’ve read that there could be some security risks involved, but I’m not clear on what those are. Can anyone elaborate on whether this is a recommended practice? What potential issues might arise if I choose to go this route? I want to ensure that my app remains secure, so any insights would be appreciated.
Transferring tokens from frontend to backend is tricky - you’ve got to think about scope and lifetime. Facebook access tokens are meant for client-side use, so sending them to your backend opens up new attack vectors. The biggest risk is token exposure during transmission and when you store them on your server. Don’t pass the raw token. Instead, set up a token exchange pattern where your backend validates the Facebook token and creates its own session token. This cuts down the vulnerability window and gives you way better control over user sessions. Also, make sure your backend never logs or caches these tokens - they could get compromised through server-side vulnerabilities.
totally get your concern. Using HTTPS is key to keep it safe. Just make sure your backend validates the token properly. If it’s out there, it could get intercepted, but SSL shld help. oh, and avoid localStorage for tokens, that’s risky.
Hmm, interesting question! What exactly are you planning to do with that token on the backend? Store user data? Make FB API calls server-side? The security approach depends on your use case. What’s your current setup like - using any auth libraries?