Logout defaults to use Global SecurityContextServerLogoutHandler

Closes gh-8375

config/src/main/java/org/springframework/security/config/web/server/ServerHttpSecurity.java

@@ -3738,7 +3738,8 @@ public class ServerHttpSecurity {
 	 */
 	public final class LogoutSpec {
 		private LogoutWebFilter logoutWebFilter = new LogoutWebFilter();
-		private List<ServerLogoutHandler> logoutHandlers = new ArrayList<>(Arrays.asList(new SecurityContextServerLogoutHandler()));
+		private final SecurityContextServerLogoutHandler DEFAULT_LOGOUT_HANDLER = new SecurityContextServerLogoutHandler();
+		private List<ServerLogoutHandler> logoutHandlers = new ArrayList<>(Arrays.asList(this.DEFAULT_LOGOUT_HANDLER));
 
 		/**
 		 * Configures the logout handler. Default is {@code SecurityContextServerLogoutHandler}
@@ -3802,6 +3803,10 @@ public class ServerHttpSecurity {
 		}
 
 		private ServerLogoutHandler createLogoutHandler() {
+			ServerSecurityContextRepository securityContextRepository = ServerHttpSecurity.this.securityContextRepository;
+			if (securityContextRepository != null) {
+				this.DEFAULT_LOGOUT_HANDLER.setSecurityContextRepository(securityContextRepository);
+			}
 			if (this.logoutHandlers.isEmpty()) {
 				return null;
 			} else if (this.logoutHandlers.size() == 1) {

config/src/test/java/org/springframework/security/config/web/server/LogoutSpecTests.java

@@ -21,6 +21,7 @@ import org.openqa.selenium.WebDriver;
 import org.springframework.security.config.annotation.web.reactive.ServerHttpSecurityConfigurationBuilder;
 import org.springframework.security.htmlunit.server.WebTestClientHtmlUnitDriverBuilder;
 import org.springframework.security.web.server.SecurityWebFilterChain;
+import org.springframework.security.web.server.context.WebSessionServerSecurityContextRepository;
 import org.springframework.security.web.server.util.matcher.ServerWebExchangeMatchers;
 import org.springframework.test.web.reactive.server.WebTestClient;
 import org.springframework.security.test.web.reactive.server.WebTestClientBuilder;
@@ -200,4 +201,46 @@ public class LogoutSpecTests {
 		homePage
 				.assertAt();
 	}
+
+
+	@Test
+	public void logoutWhenCustomSecurityContextRepositoryThenLogsOut() {
+		WebSessionServerSecurityContextRepository repository = new WebSessionServerSecurityContextRepository();
+		repository.setSpringSecurityContextAttrName("CUSTOM_CONTEXT_ATTR");
+		SecurityWebFilterChain securityWebFilter = this.http
+				.securityContextRepository(repository)
+				.authorizeExchange()
+					.anyExchange().authenticated()
+					.and()
+				.formLogin()
+					.and()
+				.logout()
+					.and()
+				.build();
+
+		WebTestClient webTestClient = WebTestClientBuilder
+				.bindToWebFilters(securityWebFilter)
+				.build();
+
+		WebDriver driver = WebTestClientHtmlUnitDriverBuilder
+				.webTestClientSetup(webTestClient)
+				.build();
+
+		FormLoginTests.DefaultLoginPage loginPage = FormLoginTests.HomePage.to(driver, FormLoginTests.DefaultLoginPage.class)
+				.assertAt();
+
+		FormLoginTests.HomePage homePage = loginPage.loginForm()
+				.username("user")
+				.password("password")
+				.submit(FormLoginTests.HomePage.class);
+
+		homePage.assertAt();
+
+		FormLoginTests.DefaultLogoutPage.to(driver)
+				.assertAt()
+				.logout();
+
+		FormLoginTests.HomePage.to(driver, FormLoginTests.DefaultLoginPage.class)
+				.assertAt();
+	}
 }

config/src/test/java/org/springframework/security/config/web/server/OAuth2LoginTests.java

@@ -83,6 +83,7 @@ import org.springframework.security.web.server.authentication.RedirectServerAuth
 import org.springframework.security.web.server.authentication.ServerAuthenticationConverter;
 import org.springframework.security.web.server.authentication.ServerAuthenticationFailureHandler;
 import org.springframework.security.web.server.authentication.ServerAuthenticationSuccessHandler;
+import org.springframework.security.web.server.authentication.logout.SecurityContextServerLogoutHandler;
 import org.springframework.security.web.server.context.ServerSecurityContextRepository;
 import org.springframework.security.web.server.savedrequest.ServerRequestCache;
 import org.springframework.security.web.server.util.matcher.ServerWebExchangeMatcher;
@@ -716,6 +717,8 @@ public class OAuth2LoginTests {
 			http
 				.csrf().disable()
 				.logout()
+					// avoid using mock ServerSecurityContextRepository for logout
+					.logoutHandler(new SecurityContextServerLogoutHandler())
 					.logoutSuccessHandler(
 							new OidcClientInitiatedServerLogoutSuccessHandler(
 									new InMemoryReactiveClientRegistrationRepository(this.withLogout)))