diff --git a/spring-webmvc/src/main/java/org/springframework/web/servlet/config/annotation/PathMatchConfigurer.java b/spring-webmvc/src/main/java/org/springframework/web/servlet/config/annotation/PathMatchConfigurer.java
index fc20853ebe3..50d6716eb98 100644
--- a/spring-webmvc/src/main/java/org/springframework/web/servlet/config/annotation/PathMatchConfigurer.java
+++ b/spring-webmvc/src/main/java/org/springframework/web/servlet/config/annotation/PathMatchConfigurer.java
@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2018 the original author or authors.
+ * Copyright 2002-2020 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.
@@ -22,6 +22,7 @@ import java.util.function.Predicate;
 
 import org.springframework.lang.Nullable;
 import org.springframework.util.PathMatcher;
+import org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerMapping;
 import org.springframework.web.util.UrlPathHelper;
 
 /**
@@ -37,7 +38,7 @@ import org.springframework.web.util.UrlPathHelper;
  *
  * @author Brian Clozel
  * @since 4.0.3
- * @see org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerMapping
+ * @see RequestMappingHandlerMapping
  * @see org.springframework.web.servlet.handler.SimpleUrlHandlerMapping
  */
 public class PathMatchConfigurer {
@@ -46,10 +47,10 @@ public class PathMatchConfigurer {
 	private Boolean suffixPatternMatch;
 
 	@Nullable
-	private Boolean trailingSlashMatch;
+	private Boolean registeredSuffixPatternMatch;
 
 	@Nullable
-	private Boolean registeredSuffixPatternMatch;
+	private Boolean trailingSlashMatch;
 
 	@Nullable
 	private UrlPathHelper urlPathHelper;
@@ -66,22 +67,16 @@ public class PathMatchConfigurer {
 	 * requests. If enabled a method mapped to "/users" also matches to "/users.*".
 	 * <p>By default this is set to {@code true}.
 	 * @see #registeredSuffixPatternMatch
+	 * @deprecated as of 5.2.4. See class-level note in
+	 * {@link RequestMappingHandlerMapping} on the deprecation of path extension
+	 * config options.
 	 */
+	@Deprecated
 	public PathMatchConfigurer setUseSuffixPatternMatch(Boolean suffixPatternMatch) {
 		this.suffixPatternMatch = suffixPatternMatch;
 		return this;
 	}
 
-	/**
-	 * Whether to match to URLs irrespective of the presence of a trailing slash.
-	 * If enabled a method mapped to "/users" also matches to "/users/".
-	 * <p>The default value is {@code true}.
-	 */
-	public PathMatchConfigurer setUseTrailingSlashMatch(Boolean trailingSlashMatch) {
-		this.trailingSlashMatch = trailingSlashMatch;
-		return this;
-	}
-
 	/**
 	 * Whether suffix pattern matching should work only against path extensions
 	 * explicitly registered when you
@@ -90,12 +85,26 @@ public class PathMatchConfigurer {
 	 * avoid issues such as when a "." appears in the path for other reasons.
 	 * <p>By default this is set to "false".
 	 * @see WebMvcConfigurer#configureContentNegotiation
+	 * @deprecated as of 5.2.4. See class-level note in
+	 * {@link RequestMappingHandlerMapping} on the deprecation of path extension
+	 * config options.
 	 */
+	@Deprecated
 	public PathMatchConfigurer setUseRegisteredSuffixPatternMatch(Boolean registeredSuffixPatternMatch) {
 		this.registeredSuffixPatternMatch = registeredSuffixPatternMatch;
 		return this;
 	}
 
+	/**
+	 * Whether to match to URLs irrespective of the presence of a trailing slash.
+	 * If enabled a method mapped to "/users" also matches to "/users/".
+	 * <p>The default value is {@code true}.
+	 */
+	public PathMatchConfigurer setUseTrailingSlashMatch(Boolean trailingSlashMatch) {
+		this.trailingSlashMatch = trailingSlashMatch;
+		return this;
+	}
+
 	/**
 	 * Set the UrlPathHelper to use for resolution of lookup paths.
 	 * <p>Use this to override the default UrlPathHelper with a custom subclass,
@@ -137,19 +146,33 @@ public class PathMatchConfigurer {
 	}
 
 
+	/**
+	 * Whether to use registered suffixes for pattern matching.
+	 * @deprecated as of 5.2.4. See class-level note in
+	 * {@link RequestMappingHandlerMapping} on the deprecation of path extension
+	 * config options.
+	 */
 	@Nullable
+	@Deprecated
 	public Boolean isUseSuffixPatternMatch() {
 		return this.suffixPatternMatch;
 	}
 
+	/**
+	 * Whether to use registered suffixes for pattern matching.
+	 * @deprecated as of 5.2.4. See class-level note in
+	 * {@link RequestMappingHandlerMapping} on the deprecation of path extension
+	 * config options.
+	 */
 	@Nullable
-	public Boolean isUseTrailingSlashMatch() {
-		return this.trailingSlashMatch;
+	@Deprecated
+	public Boolean isUseRegisteredSuffixPatternMatch() {
+		return this.registeredSuffixPatternMatch;
 	}
 
 	@Nullable
-	public Boolean isUseRegisteredSuffixPatternMatch() {
-		return this.registeredSuffixPatternMatch;
+	public Boolean isUseTrailingSlashMatch() {
+		return this.trailingSlashMatch;
 	}
 
 	@Nullable
diff --git a/spring-webmvc/src/main/java/org/springframework/web/servlet/config/annotation/WebMvcConfigurationSupport.java b/spring-webmvc/src/main/java/org/springframework/web/servlet/config/annotation/WebMvcConfigurationSupport.java
index d8f93bf4e54..1000fe12b7d 100644
--- a/spring-webmvc/src/main/java/org/springframework/web/servlet/config/annotation/WebMvcConfigurationSupport.java
+++ b/spring-webmvc/src/main/java/org/springframework/web/servlet/config/annotation/WebMvcConfigurationSupport.java
@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2019 the original author or authors.
+ * Copyright 2002-2020 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.
@@ -275,6 +275,7 @@ public class WebMvcConfigurationSupport implements ApplicationContextAware, Serv
 	 * requests to annotated controllers.
 	 */
 	@Bean
+	@SuppressWarnings("deprecation")
 	public RequestMappingHandlerMapping requestMappingHandlerMapping(
 			@Qualifier("mvcContentNegotiationManager") ContentNegotiationManager contentNegotiationManager,
 			@Qualifier("mvcConversionService") FormattingConversionService conversionService,
diff --git a/spring-webmvc/src/main/java/org/springframework/web/servlet/mvc/condition/PatternsRequestCondition.java b/spring-webmvc/src/main/java/org/springframework/web/servlet/mvc/condition/PatternsRequestCondition.java
index 1c1fd482c5f..f5df9068803 100644
--- a/spring-webmvc/src/main/java/org/springframework/web/servlet/mvc/condition/PatternsRequestCondition.java
+++ b/spring-webmvc/src/main/java/org/springframework/web/servlet/mvc/condition/PatternsRequestCondition.java
@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2019 the original author or authors.
+ * Copyright 2002-2020 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.
@@ -33,6 +33,7 @@ import org.springframework.util.AntPathMatcher;
 import org.springframework.util.PathMatcher;
 import org.springframework.util.StringUtils;
 import org.springframework.web.servlet.HandlerMapping;
+import org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerMapping;
 import org.springframework.web.util.UrlPathHelper;
 
 /**
@@ -58,23 +59,42 @@ public final class PatternsRequestCondition extends AbstractRequestCondition<Pat
 
 
 	/**
-	 * Creates a new instance with the given URL patterns.
-	 * Each pattern that is not empty and does not start with "/" is prepended with "/".
-	 * @param patterns 0 or more URL patterns; if 0 the condition will match to every request.
+	 * Creates a new instance with the given URL patterns. Each pattern that is
+	 * not empty and does not start with "/" is prepended with "/".
+	 * @param patterns 0 or more URL patterns; if 0 the condition will match to
+	 * every request.
 	 */
 	public PatternsRequestCondition(String... patterns) {
 		this(Arrays.asList(patterns), null, null, true, true, null);
 	}
 
 	/**
-	 * Additional constructor with flags for using suffix pattern (.*) and
-	 * trailing slash matches.
+	 * Alternative constructor with additional, optional {@link UrlPathHelper},
+	 * {@link PathMatcher}, and whether to automatically match trailing slashes.
+	 * @param patterns the URL patterns to use; if 0, the condition will match to every request.
+	 * @param urlPathHelper a {@link UrlPathHelper} for determining the lookup path for a request
+	 * @param pathMatcher a {@link PathMatcher} for pattern path matching
+	 * @param useTrailingSlashMatch whether to match irrespective of a trailing slash
+	 * @since 5.2.4
+	 */
+	public PatternsRequestCondition(String[] patterns, @Nullable UrlPathHelper urlPathHelper,
+			@Nullable PathMatcher pathMatcher, boolean useTrailingSlashMatch) {
+
+		this(Arrays.asList(patterns), urlPathHelper, pathMatcher, false, useTrailingSlashMatch, null);
+	}
+
+	/**
+	 * Alternative constructor with additional optional parameters.
 	 * @param patterns the URL patterns to use; if 0, the condition will match to every request.
 	 * @param urlPathHelper for determining the lookup path of a request
 	 * @param pathMatcher for path matching with patterns
 	 * @param useSuffixPatternMatch whether to enable matching by suffix (".*")
 	 * @param useTrailingSlashMatch whether to match irrespective of a trailing slash
+	 * @deprecated as of 5.2.4. See class-level note in
+	 * {@link RequestMappingHandlerMapping} on the deprecation of path extension
+	 * config options.
 	 */
+	@Deprecated
 	public PatternsRequestCondition(String[] patterns, @Nullable UrlPathHelper urlPathHelper,
 			@Nullable PathMatcher pathMatcher, boolean useSuffixPatternMatch, boolean useTrailingSlashMatch) {
 
@@ -82,15 +102,18 @@ public final class PatternsRequestCondition extends AbstractRequestCondition<Pat
 	}
 
 	/**
-	 * Creates a new instance with the given URL patterns.
-	 * Each pattern that is not empty and does not start with "/" is pre-pended with "/".
+	 * Alternative constructor with additional optional parameters.
 	 * @param patterns the URL patterns to use; if 0, the condition will match to every request.
 	 * @param urlPathHelper a {@link UrlPathHelper} for determining the lookup path for a request
 	 * @param pathMatcher a {@link PathMatcher} for pattern path matching
 	 * @param useSuffixPatternMatch whether to enable matching by suffix (".*")
 	 * @param useTrailingSlashMatch whether to match irrespective of a trailing slash
 	 * @param fileExtensions a list of file extensions to consider for path matching
+	 * @deprecated as of 5.2.4. See class-level note in
+	 * {@link RequestMappingHandlerMapping} on the deprecation of path extension
+	 * config options.
 	 */
+	@Deprecated
 	public PatternsRequestCondition(String[] patterns, @Nullable UrlPathHelper urlPathHelper,
 			@Nullable PathMatcher pathMatcher, boolean useSuffixPatternMatch,
 			boolean useTrailingSlashMatch, @Nullable List<String> fileExtensions) {
diff --git a/spring-webmvc/src/main/java/org/springframework/web/servlet/mvc/method/RequestMappingInfo.java b/spring-webmvc/src/main/java/org/springframework/web/servlet/mvc/method/RequestMappingInfo.java
index fe79fd341e8..7d728399961 100644
--- a/spring-webmvc/src/main/java/org/springframework/web/servlet/mvc/method/RequestMappingInfo.java
+++ b/spring-webmvc/src/main/java/org/springframework/web/servlet/mvc/method/RequestMappingInfo.java
@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2019 the original author or authors.
+ * Copyright 2002-2020 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.
@@ -35,6 +35,7 @@ import org.springframework.web.servlet.mvc.condition.ProducesRequestCondition;
 import org.springframework.web.servlet.mvc.condition.RequestCondition;
 import org.springframework.web.servlet.mvc.condition.RequestConditionHolder;
 import org.springframework.web.servlet.mvc.condition.RequestMethodsRequestCondition;
+import org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerMapping;
 import org.springframework.web.util.UrlPathHelper;
 
 /**
@@ -505,6 +506,7 @@ public final class RequestMappingInfo implements RequestCondition<RequestMapping
 		}
 
 		@Override
+		@SuppressWarnings("deprecation")
 		public RequestMappingInfo build() {
 			ContentNegotiationManager manager = this.options.getContentNegotiationManager();
 
@@ -600,14 +602,22 @@ public final class RequestMappingInfo implements RequestCondition<RequestMapping
 		 * Set whether to apply suffix pattern matching in PatternsRequestCondition.
 		 * <p>By default this is set to 'true'.
 		 * @see #setRegisteredSuffixPatternMatch(boolean)
+		 * @deprecated as of 5.2.4. See class-level note in
+		 * {@link RequestMappingHandlerMapping} on the deprecation of path
+		 * extension config options.
 		 */
+		@Deprecated
 		public void setSuffixPatternMatch(boolean suffixPatternMatch) {
 			this.suffixPatternMatch = suffixPatternMatch;
 		}
 
 		/**
 		 * Return whether to apply suffix pattern matching in PatternsRequestCondition.
+		 * @deprecated as of 5.2.4. See class-level note in
+		 * {@link RequestMappingHandlerMapping} on the deprecation of path
+		 * extension config options.
 		 */
+		@Deprecated
 		public boolean useSuffixPatternMatch() {
 			return this.suffixPatternMatch;
 		}
@@ -618,7 +628,12 @@ public final class RequestMappingInfo implements RequestCondition<RequestMapping
 		 * {@code suffixPatternMatch=true} and requires that a
 		 * {@link #setContentNegotiationManager} is also configured in order to
 		 * obtain the registered file extensions.
+		 * @deprecated as of 5.2.4. See class-level note in
+		 * {@link RequestMappingHandlerMapping} on the deprecation of path
+		 * extension config options; note also that in 5.3 the default for this
+		 * property switches from {@code false} to {@code true}.
 		 */
+		@Deprecated
 		public void setRegisteredSuffixPatternMatch(boolean registeredSuffixPatternMatch) {
 			this.registeredSuffixPatternMatch = registeredSuffixPatternMatch;
 			this.suffixPatternMatch = (registeredSuffixPatternMatch || this.suffixPatternMatch);
@@ -627,7 +642,11 @@ public final class RequestMappingInfo implements RequestCondition<RequestMapping
 		/**
 		 * Return whether suffix pattern matching should be restricted to registered
 		 * file extensions only.
+		 * @deprecated as of 5.2.4. See class-level note in
+		 * {@link RequestMappingHandlerMapping} on the deprecation of path
+		 * extension config options.
 		 */
+		@Deprecated
 		public boolean useRegisteredSuffixPatternMatch() {
 			return this.registeredSuffixPatternMatch;
 		}
@@ -636,8 +655,12 @@ public final class RequestMappingInfo implements RequestCondition<RequestMapping
 		 * Return the file extensions to use for suffix pattern matching. If
 		 * {@code registeredSuffixPatternMatch=true}, the extensions are obtained
 		 * from the configured {@code contentNegotiationManager}.
+		 * @deprecated as of 5.2.4. See class-level note in
+		 * {@link RequestMappingHandlerMapping} on the deprecation of path
+		 * extension config options.
 		 */
 		@Nullable
+		@Deprecated
 		public List<String> getFileExtensions() {
 			if (useRegisteredSuffixPatternMatch() && this.contentNegotiationManager != null) {
 				return this.contentNegotiationManager.getAllFileExtensions();
diff --git a/spring-webmvc/src/main/java/org/springframework/web/servlet/mvc/method/annotation/RequestMappingHandlerMapping.java b/spring-webmvc/src/main/java/org/springframework/web/servlet/mvc/method/annotation/RequestMappingHandlerMapping.java
index 3dadc61a370..5b6d42ed49e 100644
--- a/spring-webmvc/src/main/java/org/springframework/web/servlet/mvc/method/annotation/RequestMappingHandlerMapping.java
+++ b/spring-webmvc/src/main/java/org/springframework/web/servlet/mvc/method/annotation/RequestMappingHandlerMapping.java
@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2019 the original author or authors.
+ * Copyright 2002-2020 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.
@@ -59,6 +59,18 @@ import org.springframework.web.servlet.mvc.method.RequestMappingInfoHandlerMappi
  * {@link RequestMapping @RequestMapping} annotations in
  * {@link Controller @Controller} classes.
  *
+ * <p><strong>Note:</strong></p> In 5.2.4,
+ * {@link #setUseSuffixPatternMatch(boolean) useSuffixPatternMatch} and
+ * {@link #setUseRegisteredSuffixPatternMatch(boolean) useRegisteredSuffixPatternMatch}
+ * are deprecated in order to discourage use of path extensions for request
+ * mapping and for content negotiation (with similar deprecations in
+ * {@link ContentNegotiationManager}). For further context, please read issue
+ * <a href="https://github.com/spring-projects/spring-framework/issues/24179">#24719</a>.
+ *
+ * <p>In 5.3, {@link #setUseRegisteredSuffixPatternMatch(boolean) useRegisteredSuffixPatternMatch}
+ * switches to being on by default so that path matching becomes constrained
+ * to registered suffixes only.
+ *
  * @author Arjen Poutsma
  * @author Rossen Stoyanchev
  * @author Sam Brannen
@@ -89,7 +101,10 @@ public class RequestMappingHandlerMapping extends RequestMappingInfoHandlerMappi
 	 * <p>The default value is {@code true}.
 	 * <p>Also see {@link #setUseRegisteredSuffixPatternMatch(boolean)} for
 	 * more fine-grained control over specific suffixes to allow.
+	 * @deprecated as of 5.2.4. See class level comment about deprecation of
+	 * path extension config options.
 	 */
+	@Deprecated
 	public void setUseSuffixPatternMatch(boolean useSuffixPatternMatch) {
 		this.useSuffixPatternMatch = useSuffixPatternMatch;
 	}
@@ -100,7 +115,11 @@ public class RequestMappingHandlerMapping extends RequestMappingInfoHandlerMappi
 	 * is generally recommended to reduce ambiguity and to avoid issues such as
 	 * when a "." appears in the path for other reasons.
 	 * <p>By default this is set to "false".
+	 * @deprecated as of 5.2.4. See class level comment about deprecation of
+	 * path extension config options note also that in 5.3 the default for this
+	 * property will switch from {@code false} to {@code true}.
 	 */
+	@Deprecated
 	public void setUseRegisteredSuffixPatternMatch(boolean useRegisteredSuffixPatternMatch) {
 		this.useRegisteredSuffixPatternMatch = useRegisteredSuffixPatternMatch;
 		this.useSuffixPatternMatch = (useRegisteredSuffixPatternMatch || this.useSuffixPatternMatch);
@@ -159,13 +178,14 @@ public class RequestMappingHandlerMapping extends RequestMappingInfoHandlerMappi
 	}
 
 	@Override
+	@SuppressWarnings("deprecation")
 	public void afterPropertiesSet() {
 		this.config = new RequestMappingInfo.BuilderConfiguration();
 		this.config.setUrlPathHelper(getUrlPathHelper());
 		this.config.setPathMatcher(getPathMatcher());
-		this.config.setSuffixPatternMatch(this.useSuffixPatternMatch);
-		this.config.setTrailingSlashMatch(this.useTrailingSlashMatch);
-		this.config.setRegisteredSuffixPatternMatch(this.useRegisteredSuffixPatternMatch);
+		this.config.setSuffixPatternMatch(useSuffixPatternMatch());
+		this.config.setTrailingSlashMatch(useTrailingSlashMatch());
+		this.config.setRegisteredSuffixPatternMatch(useRegisteredSuffixPatternMatch());
 		this.config.setContentNegotiationManager(getContentNegotiationManager());
 
 		super.afterPropertiesSet();
@@ -173,15 +193,21 @@ public class RequestMappingHandlerMapping extends RequestMappingInfoHandlerMappi
 
 
 	/**
-	 * Whether to use suffix pattern matching.
+	 * Whether to use registered suffixes for pattern matching.
+	 * @deprecated as of 5.2.4. See class-level note on the deprecation of path
+	 * extension config options.
 	 */
+	@Deprecated
 	public boolean useSuffixPatternMatch() {
 		return this.useSuffixPatternMatch;
 	}
 
 	/**
 	 * Whether to use registered suffixes for pattern matching.
+	 * @deprecated as of 5.2.4. See class-level note on the deprecation of path
+	 * extension config options.
 	 */
+	@Deprecated
 	public boolean useRegisteredSuffixPatternMatch() {
 		return this.useRegisteredSuffixPatternMatch;
 	}
@@ -195,8 +221,12 @@ public class RequestMappingHandlerMapping extends RequestMappingInfoHandlerMappi
 
 	/**
 	 * Return the file extensions to use for suffix pattern matching.
+	 * @deprecated as of 5.2.4. See class-level note on the deprecation of path
+	 * extension config options.
 	 */
 	@Nullable
+	@Deprecated
+	@SuppressWarnings("deprecation")
 	public List<String> getFileExtensions() {
 		return this.config.getFileExtensions();
 	}