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.
github.com/spring-projects/spring-framework
github.com/spring-projects/spring-framework/commit/bc7d01048579430b4b2df668178809b63d3f1929
nvd.nist.gov/vuln/detail/CVE-2020-5397
pivotal.io/security/cve-2020-5397
www.oracle.com//security-alerts/cpujul2021.html
www.oracle.com/security-alerts/cpuapr2020.html
www.oracle.com/security-alerts/cpujul2020.html
www.oracle.com/security-alerts/cpujul2022.html
www.oracle.com/security-alerts/cpuoct2020.html
www.oracle.com/security-alerts/cpuoct2021.html