diff --git a/maven-core/src/main/java/org/apache/maven/plugin/DefaultBuildPluginManager.java b/maven-core/src/main/java/org/apache/maven/plugin/DefaultBuildPluginManager.java
index b4f7a4df23..3af1125341 100644
--- a/maven-core/src/main/java/org/apache/maven/plugin/DefaultBuildPluginManager.java
+++ b/maven-core/src/main/java/org/apache/maven/plugin/DefaultBuildPluginManager.java
@@ -106,8 +106,11 @@ public void executeMojo( MavenSession session, MojoExecution mojoExecution )
             throw new PluginExecutionException( mojoExecution, project, e );
         }
 
+        // use project realm as thread context classloader to enable components from all extensions=true plugins
+        ClassRealm tccl = mojoExecution.getPlugin().isExtensions() ? project.getClassRealm() : pluginRealm;
+
         ClassLoader oldClassLoader = Thread.currentThread().getContextClassLoader();
-        Thread.currentThread().setContextClassLoader( pluginRealm );
+        Thread.currentThread().setContextClassLoader( tccl );
 
         MavenSession oldSession = legacySupport.getSession();