I am extending a widget application(Client B) to be added to a website(Client A) of a business client. An authenticated user in Client A should be able to seamlessly login to Client B. If that is not possible, the user should be able to log in to Client B using a login form. Client A NextJS with…

Hi @nish_rm , Welcome to the Auth0 Community! I am glad that you managed to find a solution for establishing the session between the client app and the embedded widget. As you mentioned, a custom domain was not required to establish SSO between these two components as long as both applications used…

Authentication between a website and an embedded widget (iframe or shadowDOM)

Get Help

Billy958Browne July 23, 2025, 5:40am 2

Hello!
I faced similar kind of issue last time, I am still searching for some proper answer.

1 Like

Topic		Replies	Views
Cross-Domain Auth with Auth0 for Embedded Widget Get Help sessions , authentication-sessions	2	13	July 2, 2025
Is it secure to embed SPA in iframe? Get Help spa , login , iframe , embedded-login	3	4160	May 26, 2021
Authorize without IFrame when on Custom domain Get Help custom-domain	2	4277	July 13, 2020
Allowing auth0 third party cookies Get Help connections , custom-social-connections-branding	2	328	December 17, 2024
Login cross-site with new universal login and iFrames Get Help login-experience , new-universal-login-experience	5	2089	January 28, 2025

Authentication between a website and an embedded widget (iframe or shadowDOM)

Related topics