diff --git a/maven-model-builder/src/main/java/org/apache/maven/model/profile/ProfileInjector.java b/maven-model-builder/src/main/java/org/apache/maven/model/profile/ProfileInjector.java
index 1773587c06d8..558653c23bf5 100644
--- a/maven-model-builder/src/main/java/org/apache/maven/model/profile/ProfileInjector.java
+++ b/maven-model-builder/src/main/java/org/apache/maven/model/profile/ProfileInjector.java
@@ -42,15 +42,44 @@ public interface ProfileInjector {
      */
     void injectProfile(Model model, Profile profile, ModelBuildingRequest request, ModelProblemCollector problems);
 
-    org.apache.maven.api.model.Model injectProfile(
+    /**
+     * Merges values from the specified profile into the given model. Implementations are expected to keep the profile
+     * and model completely decoupled by injecting deep copies rather than the original objects from the profile.
+     *
+     * @param model The model into which to merge the values defined by the profile, must not be <code>null</code>.
+     * @param profile The (read-only) profile whose values should be injected, may be <code>null</code>.
+     * @param request The model building request that holds further settings, must not be {@code null}.
+     * @param problems The container used to collect problems that were encountered, must not be {@code null}.
+     */
+    default org.apache.maven.api.model.Model injectProfile(
             org.apache.maven.api.model.Model model,
             org.apache.maven.api.model.Profile profile,
             ModelBuildingRequest request,
-            ModelProblemCollector problems);
+            ModelProblemCollector problems) {
+        Model m = new Model(model);
+        injectProfile(m, profile != null ? new Profile(profile) : null, request, problems);
+        return m.getDelegate();
+    }
 
-    org.apache.maven.api.model.Model injectProfiles(
+    /**
+     * Merges values from the specified profile into the given model. Implementations are expected to keep the profile
+     * and model completely decoupled by injecting deep copies rather than the original objects from the profile.
+     *
+     * @param model The model into which to merge the values defined by the profile, must not be <code>null</code>.
+     * @param profiles The (read-only) list of profiles whose values should be injected, must not be <code>null</code>.
+     * @param request The model building request that holds further settings, must not be {@code null}.
+     * @param problems The container used to collect problems that were encountered, must not be {@code null}.
+     */
+    default org.apache.maven.api.model.Model injectProfiles(
             org.apache.maven.api.model.Model model,
             List<org.apache.maven.api.model.Profile> profiles,
             ModelBuildingRequest request,
-            ModelProblemCollector problems);
+            ModelProblemCollector problems) {
+        for (org.apache.maven.api.model.Profile profile : profiles) {
+            if (profile != null) {
+                model = injectProfile(model, profile, request, problems);
+            }
+        }
+        return model;
+    }
 }
diff --git a/maven-model-builder/src/main/java/org/apache/maven/model/profile/ProfileSelector.java b/maven-model-builder/src/main/java/org/apache/maven/model/profile/ProfileSelector.java
index 75b956e6f6a3..4a66309e22ef 100644
--- a/maven-model-builder/src/main/java/org/apache/maven/model/profile/ProfileSelector.java
+++ b/maven-model-builder/src/main/java/org/apache/maven/model/profile/ProfileSelector.java
@@ -20,6 +20,7 @@
 
 import java.util.Collection;
 import java.util.List;
+import java.util.stream.Collectors;
 import org.apache.maven.model.Profile;
 import org.apache.maven.model.building.ModelProblemCollector;
 
@@ -43,8 +44,23 @@ public interface ProfileSelector {
     List<Profile> getActiveProfiles(
             Collection<Profile> profiles, ProfileActivationContext context, ModelProblemCollector problems);
 
-    List<org.apache.maven.api.model.Profile> getActiveProfilesV4(
+    /**
+     * Determines the profiles which are active in the specified activation context. Active profiles will eventually be
+     * injected into the model.
+     *
+     * @param profiles The profiles whose activation status should be determined, must not be {@code null}.
+     * @param context The environmental context used to determine the activation status of a profile, must not be
+     *            {@code null}.
+     * @param problems The container used to collect problems that were encountered, must not be {@code null}.
+     * @return The profiles that have been activated, never {@code null}.
+     */
+    default List<org.apache.maven.api.model.Profile> getActiveProfilesV4(
             Collection<org.apache.maven.api.model.Profile> profiles,
             ProfileActivationContext context,
-            ModelProblemCollector problems);
+            ModelProblemCollector problems) {
+        return getActiveProfiles(profiles.stream().map(Profile::new).collect(Collectors.toList()), context, problems)
+                .stream()
+                .map(Profile::getDelegate)
+                .collect(Collectors.toList());
+    }
 }