This affects the package hellojs before 1.18.6. The code get the param oauth_redirect from url and pass it to location.assign without any check and sanitisation. So we can simply pass some XSS payloads into the url param oauth_redirect, such as javascript:alert(1).
This affects the package hellojs before
Exploit
CVE-2020-7741
NVD
Refer to CVE-2020-7741 NVD advisory