CVE-2020-5397

Spring Framework, versions 5.2.x prior to 5.2.3 are vulnerable to CSRF
attacks through CORS preflight requests that target Spring MVC
(spring-webmvc module) or Spring WebFlux (spring-webflux module) endpoints.
Only non-authenticated endpoints are vulnerable because preflight requests
should not include credentials and therefore requests should fail
authentication. However a notable exception to this are Chrome based
browsers when using client certificates for authentication since Chrome
sends TLS client certificates in CORS preflight requests in violation of
spec requirements. No HTTP body can be sent or received as a result of this
attack.