Spring-Security OAuth WebMVC Invalid CORS request
<p>Hopefully my final question to get all this working. Using Spring Security OAuth 2.0.8 and Spring-Web MVC 4.2.3 to expose the OAuth endpoints (the majority of the system uses RESTEasy for the REST endpoints, which has its own CORS filter).</p>

<p>I am trying to use the global default CORS support that is now in Web MVC 4.2.x. However, when issuing a test preflight request against the /oauth/token endpoint, I am always getting returned a 403 Invalid CORS Request response. Sample request from Fiddler is below.</p>

<pre><code>OPTIONS http://localhost:8080/myapp/oauth/token HTTP/1.1
User-Agent: Fiddler
Host: localhost:8080
Origin: http://testfakeorigin.overtherainbow.com
Access-Control-Request-Method: POST
</code></pre>

<p>Even though this goes through and is determined to be a proper preflight request, it looks like the request fails in DefaultCorsProcessor at line 81 because the CorsConfiguration is null. Even if I explicitly add a CORS registry mapping in my WebMvcConfigurerAdapter (which shouldn't be necessary according to the docs), the config still ends up being null. Where should I look next?</p>