Vulnerability : Arbitrary Access Through CORS Misconfiguration

[sgwgsw]

https://github.com/q191201771/lal/blob/92252c8b91004301b13e353063a1a9f1a362969a/pkg/base/cors.go#L13C1-L17

"Access-Control-Allow-Origin: *" Is set, granting any domain access to CORS resources. There should be a white-list in the configuration that lists allowed Origin headers.

The issue is made worse with "Access-Control-Allow-Credentials: true". Now that any domain can access the endpoints, they also can also authenticate as another user. This can be done by sending a crafted link to a user who is logged in (presumably, unless session token is persistent) - once clicked, the script would send a CORS request to sensitive endpoints and the browser would send along their cookies since "Access-Control-Allow-Credentials: true" is set.