In trusted-proxy mode, enforceOriginCheckForAnyClient was set to false
whenever proxy headers were present. This allowed browser-originated
WebSocket connections from untrusted origins to bypass origin validation
entirely, as the check only ran for control-ui and webchat client types.
An attacker serving a page from an untrusted origin could connect through
a trusted reverse proxy, inherit proxy-injected identity, and obtain
operator.admin access via the sharedAuthOk / roleCanSkipDeviceIdentity
path without any origin restriction.
Remove the hasProxyHeaders exemption so origin validation runs for all
browser-originated connections regardless of how the request arrived.
Fixes GHSA-5wcw-8jjv-m286
ebed3bbde1