diff --git a/buildSrc/src/main/groovy/io/spring/gradle/convention/JacocoPlugin.groovy b/buildSrc/src/main/groovy/io/spring/gradle/convention/JacocoPlugin.groovy
index 8f558eabbe..7a8def2b6d 100644
--- a/buildSrc/src/main/groovy/io/spring/gradle/convention/JacocoPlugin.groovy
+++ b/buildSrc/src/main/groovy/io/spring/gradle/convention/JacocoPlugin.groovy
@@ -34,7 +34,7 @@ class JacocoPlugin implements Plugin<Project> {
 			project.tasks.check.dependsOn project.tasks.jacocoTestReport
 
 			project.jacoco {
-				toolVersion = '0.8.7'
+				toolVersion = '0.8.9'
 			}
 		}
 	}
diff --git a/oauth2/oauth2-client/src/main/java/org/springframework/security/oauth2/client/jackson2/OAuth2AuthenticationExceptionMixin.java b/oauth2/oauth2-client/src/main/java/org/springframework/security/oauth2/client/jackson2/OAuth2AuthenticationExceptionMixin.java
index 9fa810c1ac..cf2e4818b9 100644
--- a/oauth2/oauth2-client/src/main/java/org/springframework/security/oauth2/client/jackson2/OAuth2AuthenticationExceptionMixin.java
+++ b/oauth2/oauth2-client/src/main/java/org/springframework/security/oauth2/client/jackson2/OAuth2AuthenticationExceptionMixin.java
@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2020 the original author or authors.
+ * Copyright 2002-2023 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.
@@ -30,16 +30,23 @@ import org.springframework.security.oauth2.core.OAuth2Error;
  * {@link OAuth2AuthenticationException}.
  *
  * @author Dennis Neufeld
+ * @author Steve Riesenberg
  * @since 5.3.4
  * @see OAuth2AuthenticationException
  * @see OAuth2ClientJackson2Module
  */
 @JsonTypeInfo(use = JsonTypeInfo.Id.CLASS)
-@JsonAutoDetect(fieldVisibility = JsonAutoDetect.Visibility.ANY, getterVisibility = JsonAutoDetect.Visibility.NONE,
+@JsonAutoDetect(fieldVisibility = JsonAutoDetect.Visibility.NONE, getterVisibility = JsonAutoDetect.Visibility.NONE,
 		isGetterVisibility = JsonAutoDetect.Visibility.NONE)
 @JsonIgnoreProperties(ignoreUnknown = true, value = { "cause", "stackTrace", "suppressedExceptions" })
 abstract class OAuth2AuthenticationExceptionMixin {
 
+	@JsonProperty("error")
+	abstract OAuth2Error getError();
+
+	@JsonProperty("detailMessage")
+	abstract String getMessage();
+
 	@JsonCreator
 	OAuth2AuthenticationExceptionMixin(@JsonProperty("error") OAuth2Error error,
 			@JsonProperty("detailMessage") String message) {
diff --git a/saml2/saml2-service-provider/src/main/java/org/springframework/security/saml2/jackson2/Saml2AuthenticationExceptionMixin.java b/saml2/saml2-service-provider/src/main/java/org/springframework/security/saml2/jackson2/Saml2AuthenticationExceptionMixin.java
index 3bbee42f24..1e739c38f4 100644
--- a/saml2/saml2-service-provider/src/main/java/org/springframework/security/saml2/jackson2/Saml2AuthenticationExceptionMixin.java
+++ b/saml2/saml2-service-provider/src/main/java/org/springframework/security/saml2/jackson2/Saml2AuthenticationExceptionMixin.java
@@ -34,10 +34,16 @@ import org.springframework.security.saml2.provider.service.authentication.Saml2A
  * @see Saml2Jackson2Module
  */
 @JsonTypeInfo(use = JsonTypeInfo.Id.CLASS)
-@JsonAutoDetect(fieldVisibility = JsonAutoDetect.Visibility.ANY, getterVisibility = JsonAutoDetect.Visibility.NONE,
+@JsonAutoDetect(fieldVisibility = JsonAutoDetect.Visibility.NONE, getterVisibility = JsonAutoDetect.Visibility.NONE,
 		isGetterVisibility = JsonAutoDetect.Visibility.NONE)
 @JsonIgnoreProperties(ignoreUnknown = true, value = { "cause", "stackTrace", "suppressedExceptions" })
-class Saml2AuthenticationExceptionMixin {
+abstract class Saml2AuthenticationExceptionMixin {
+
+	@JsonProperty("error")
+	abstract Saml2Error getSaml2Error();
+
+	@JsonProperty("detailMessage")
+	abstract String getMessage();
 
 	@JsonCreator
 	Saml2AuthenticationExceptionMixin(@JsonProperty("error") Saml2Error error,