Issue with login

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Some people are seeing other peoples information, when logging into the application. The application is using Next 15 and is hosted in Netlify. After this happens, the person cant login to their own account at all.

Hi @loginissue

Welcome to the Auth0 Community!

Can you share more details regarding the login issue, mainly that other users see other people’s information?

Thanks
Dawid

Hello David.

So I am using Auth0 free version and Google sign in to login to my app. I built the app on top of the Auth0 provided next.js example app, which is working ok in localhost. The app also works correctly for me, when I am logging in to the Netlify version of it.

Some users have reported, that they see my (and some other users) information in their screen, Auth0 is incorrectly returning wrong information to their client. This seems to be related to returning users.

As I am logging in, the application sends /api/auth/me -request, which return 200 OK (even though for testing I have set the session time to be 1 minute in Auth0, which seems odd) and the /authorize -request is made 2 times, the dev tool network page says for the 1st one that initiator is login and fails as “CORS error” and the second ones initiator is preflight and returns 404. For me, the logging in and out works correctly even though I get these two errors.