Improve documentation and matching algorithm in data binders

spring-webmvc/src/main/java/org/springframework/web/servlet/mvc/method/annotation/ExtendedServletRequestDataBinder.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2021 the original author or authors.
+ * Copyright 2002-2022 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -29,6 +29,15 @@ import org.springframework.web.servlet.HandlerMapping;
  * Subclass of {@link ServletRequestDataBinder} that adds URI template variables
  * to the values used for data binding.
  *
+ * <p><strong>WARNING</strong>: Data binding can lead to security issues by exposing
+ * parts of the object graph that are not meant to be accessed or modified by
+ * external clients. Therefore the design and use of data binding should be considered
+ * carefully with regard to security. For more details, please refer to the dedicated
+ * sections on data binding for
+ * <a href="https://docs.spring.io/spring-framework/docs/current/reference/html/web.html#mvc-ann-initbinder-model-design">Spring Web MVC</a> and
+ * <a href="https://docs.spring.io/spring-framework/docs/current/reference/html/web-reactive.html#webflux-ann-initbinder-model-design">Spring WebFlux</a>
+ * in the reference manual.
+ *
  * @author Rossen Stoyanchev
  * @since 3.1
  * @see ServletRequestDataBinder