diff --git a/apps/pom.xml b/apps/pom.xml
index 63d839ee3..c1ad3e155 100644
--- a/apps/pom.xml
+++ b/apps/pom.xml
@@ -24,7 +24,7 @@
     <parent>
         <groupId>org.apache.struts</groupId>
         <artifactId>struts2-parent</artifactId>
-        <version>6.5.0</version>
+        <version>6.6.0-SNAPSHOT</version>
     </parent>
     <artifactId>struts2-apps</artifactId>
     <packaging>pom</packaging>
diff --git a/apps/rest-showcase/pom.xml b/apps/rest-showcase/pom.xml
index 988470dfd..c80c386be 100644
--- a/apps/rest-showcase/pom.xml
+++ b/apps/rest-showcase/pom.xml
@@ -24,12 +24,12 @@
     <parent>
         <groupId>org.apache.struts</groupId>
         <artifactId>struts2-apps</artifactId>
-        <version>6.5.0</version>
+        <version>6.6.0-SNAPSHOT</version>
     </parent>
 
     <artifactId>struts2-rest-showcase</artifactId>
     <packaging>war</packaging>
-    <version>6.5.0</version>
+    <version>6.6.0-SNAPSHOT</version>
     <name>Struts 2 Rest Showcase Webapp</name>
     <description>Struts 2 Rest Showcase Example</description>
 
diff --git a/apps/showcase/pom.xml b/apps/showcase/pom.xml
index 493224953..3ea6e3dc8 100644
--- a/apps/showcase/pom.xml
+++ b/apps/showcase/pom.xml
@@ -24,7 +24,7 @@
     <parent>
         <groupId>org.apache.struts</groupId>
         <artifactId>struts2-apps</artifactId>
-        <version>6.5.0</version>
+        <version>6.6.0-SNAPSHOT</version>
     </parent>
 
     <artifactId>struts2-showcase</artifactId>
diff --git a/assembly/pom.xml b/assembly/pom.xml
index 64b23130b..a7c92a79f 100644
--- a/assembly/pom.xml
+++ b/assembly/pom.xml
@@ -24,7 +24,7 @@
     <parent>
         <groupId>org.apache.struts</groupId>
         <artifactId>struts2-parent</artifactId>
-        <version>6.5.0</version>
+        <version>6.6.0-SNAPSHOT</version>
     </parent>
 
     <artifactId>struts2-assembly</artifactId>
diff --git a/bom/pom.xml b/bom/pom.xml
index 7ceff99bb..93beb6666 100644
--- a/bom/pom.xml
+++ b/bom/pom.xml
@@ -25,11 +25,11 @@
     <parent>
         <groupId>org.apache.struts</groupId>
         <artifactId>struts2-parent</artifactId>
-        <version>6.5.0</version>
+        <version>6.6.0-SNAPSHOT</version>
     </parent>
 
     <artifactId>struts2-bom</artifactId>
-    <version>6.5.0</version>
+    <version>6.6.0-SNAPSHOT</version>
     <packaging>pom</packaging>
 
     <name>Struts 2 Bill of Materials</name>
@@ -44,7 +44,7 @@
     </licenses>
 
     <properties>
-        <struts-version.version>6.5.0</struts-version.version>
+        <struts-version.version>6.6.0-SNAPSHOT</struts-version.version>
         <maven.site.skip>true</maven.site.skip>
         <maven.site.deploy.skip>true</maven.site.deploy.skip>
     </properties>
@@ -190,7 +190,7 @@
     </dependencyManagement>
 
   <scm>
-    <tag>STRUTS_6_5_0</tag>
+    <tag>STRUTS_6_3_0_1</tag>
     <connection>scm:git:https://gitbox.apache.org/repos/asf/struts.git</connection>
     <developerConnection>scm:git:https://gitbox.apache.org/repos/asf/struts.git</developerConnection>
     <url>https://github.com/apache/struts/</url>
diff --git a/bundles/admin/pom.xml b/bundles/admin/pom.xml
index 050912b93..16e119125 100644
--- a/bundles/admin/pom.xml
+++ b/bundles/admin/pom.xml
@@ -24,7 +24,7 @@
     <parent>
         <groupId>org.apache.struts</groupId>
         <artifactId>struts2-osgi-bundles</artifactId>
-        <version>6.5.0</version>
+        <version>6.6.0-SNAPSHOT</version>
     </parent>
 
     <artifactId>struts2-osgi-admin-bundle</artifactId>
diff --git a/bundles/demo/pom.xml b/bundles/demo/pom.xml
index 8760613f3..0a09ae410 100644
--- a/bundles/demo/pom.xml
+++ b/bundles/demo/pom.xml
@@ -24,7 +24,7 @@
     <parent>
         <groupId>org.apache.struts</groupId>
         <artifactId>struts2-osgi-bundles</artifactId>
-        <version>6.5.0</version>
+        <version>6.6.0-SNAPSHOT</version>
     </parent>
 
     <artifactId>struts2-osgi-demo-bundle</artifactId>
diff --git a/bundles/pom.xml b/bundles/pom.xml
index 64336a28c..1709f6898 100755
--- a/bundles/pom.xml
+++ b/bundles/pom.xml
@@ -24,7 +24,7 @@
     <parent>
         <groupId>org.apache.struts</groupId>
         <artifactId>struts2-parent</artifactId>
-        <version>6.5.0</version>
+        <version>6.6.0-SNAPSHOT</version>
     </parent>
 
     <artifactId>struts2-osgi-bundles</artifactId>
diff --git a/core/pom.xml b/core/pom.xml
index 5689f0cf8..84b2c7212 100644
--- a/core/pom.xml
+++ b/core/pom.xml
@@ -24,7 +24,7 @@
     <parent>
         <groupId>org.apache.struts</groupId>
         <artifactId>struts2-parent</artifactId>
-        <version>6.5.0</version>
+        <version>6.6.0-SNAPSHOT</version>
     </parent>
     <artifactId>struts2-core</artifactId>
     <packaging>jar</packaging>
diff --git a/plugins/async/pom.xml b/plugins/async/pom.xml
index f17ae2234..3bd4d1404 100644
--- a/plugins/async/pom.xml
+++ b/plugins/async/pom.xml
@@ -24,7 +24,7 @@
     <parent>
         <groupId>org.apache.struts</groupId>
         <artifactId>struts2-plugins</artifactId>
-        <version>6.5.0</version>
+        <version>6.6.0-SNAPSHOT</version>
     </parent>
 
     <artifactId>struts2-async-plugin</artifactId>
diff --git a/plugins/bean-validation/pom.xml b/plugins/bean-validation/pom.xml
index fb2261488..937d7a403 100644
--- a/plugins/bean-validation/pom.xml
+++ b/plugins/bean-validation/pom.xml
@@ -24,7 +24,7 @@
     <parent>
         <groupId>org.apache.struts</groupId>
         <artifactId>struts2-plugins</artifactId>
-        <version>6.5.0</version>
+        <version>6.6.0-SNAPSHOT</version>
     </parent>
     <modelVersion>4.0.0</modelVersion>
 
diff --git a/plugins/cdi/pom.xml b/plugins/cdi/pom.xml
index b16fea0ec..88dd28eb0 100644
--- a/plugins/cdi/pom.xml
+++ b/plugins/cdi/pom.xml
@@ -25,7 +25,7 @@
     <parent>
         <groupId>org.apache.struts</groupId>
         <artifactId>struts2-plugins</artifactId>
-        <version>6.5.0</version>
+        <version>6.6.0-SNAPSHOT</version>
     </parent>
 
     <artifactId>struts2-cdi-plugin</artifactId>
diff --git a/plugins/config-browser/pom.xml b/plugins/config-browser/pom.xml
index a57c2beca..f98bb6773 100644
--- a/plugins/config-browser/pom.xml
+++ b/plugins/config-browser/pom.xml
@@ -24,7 +24,7 @@
     <parent>
         <groupId>org.apache.struts</groupId>
         <artifactId>struts2-plugins</artifactId>
-        <version>6.5.0</version>
+        <version>6.6.0-SNAPSHOT</version>
     </parent>
 
     <artifactId>struts2-config-browser-plugin</artifactId>
diff --git a/plugins/convention/pom.xml b/plugins/convention/pom.xml
index e44081aed..7f47c8204 100644
--- a/plugins/convention/pom.xml
+++ b/plugins/convention/pom.xml
@@ -24,7 +24,7 @@
     <parent>
         <groupId>org.apache.struts</groupId>
         <artifactId>struts2-plugins</artifactId>
-        <version>6.5.0</version>
+        <version>6.6.0-SNAPSHOT</version>
     </parent>
 
     <artifactId>struts2-convention-plugin</artifactId>
diff --git a/plugins/dwr/pom.xml b/plugins/dwr/pom.xml
index a03bdfe2a..06c030251 100644
--- a/plugins/dwr/pom.xml
+++ b/plugins/dwr/pom.xml
@@ -24,7 +24,7 @@
     <parent>
         <groupId>org.apache.struts</groupId>
         <artifactId>struts2-plugins</artifactId>
-        <version>6.5.0</version>
+        <version>6.6.0-SNAPSHOT</version>
     </parent>
 
     <artifactId>struts2-dwr-plugin</artifactId>
diff --git a/plugins/embeddedjsp/pom.xml b/plugins/embeddedjsp/pom.xml
index 693c6ab6f..4df449276 100644
--- a/plugins/embeddedjsp/pom.xml
+++ b/plugins/embeddedjsp/pom.xml
@@ -24,7 +24,7 @@
     <parent>
         <groupId>org.apache.struts</groupId>
         <artifactId>struts2-plugins</artifactId>
-        <version>6.5.0</version>
+        <version>6.6.0-SNAPSHOT</version>
     </parent>
 
     <artifactId>struts2-embeddedjsp-plugin</artifactId>
diff --git a/plugins/gxp/pom.xml b/plugins/gxp/pom.xml
index 539d0665d..8572ebc6f 100644
--- a/plugins/gxp/pom.xml
+++ b/plugins/gxp/pom.xml
@@ -24,7 +24,7 @@
     <parent>
         <groupId>org.apache.struts</groupId>
         <artifactId>struts2-plugins</artifactId>
-        <version>6.5.0</version>
+        <version>6.6.0-SNAPSHOT</version>
     </parent>
 
     <artifactId>struts2-gxp-plugin</artifactId>
diff --git a/plugins/jasperreports/pom.xml b/plugins/jasperreports/pom.xml
index 393db8e9d..6250aa21a 100644
--- a/plugins/jasperreports/pom.xml
+++ b/plugins/jasperreports/pom.xml
@@ -24,7 +24,7 @@
     <parent>
         <groupId>org.apache.struts</groupId>
         <artifactId>struts2-plugins</artifactId>
-        <version>6.5.0</version>
+        <version>6.6.0-SNAPSHOT</version>
     </parent>
 
     <artifactId>struts2-jasperreports-plugin</artifactId>
diff --git a/plugins/javatemplates/pom.xml b/plugins/javatemplates/pom.xml
index 841bb2ed8..54f33a6a0 100644
--- a/plugins/javatemplates/pom.xml
+++ b/plugins/javatemplates/pom.xml
@@ -25,7 +25,7 @@
     <parent>
         <groupId>org.apache.struts</groupId>
         <artifactId>struts2-plugins</artifactId>
-        <version>6.5.0</version>
+        <version>6.6.0-SNAPSHOT</version>
     </parent>
 
     <artifactId>struts2-javatemplates-plugin</artifactId>
diff --git a/plugins/jfreechart/pom.xml b/plugins/jfreechart/pom.xml
index 93e6f6c3c..fe3b3d33d 100644
--- a/plugins/jfreechart/pom.xml
+++ b/plugins/jfreechart/pom.xml
@@ -24,7 +24,7 @@
     <parent>
         <groupId>org.apache.struts</groupId>
         <artifactId>struts2-plugins</artifactId>
-        <version>6.5.0</version>
+        <version>6.6.0-SNAPSHOT</version>
     </parent>
 
     <artifactId>struts2-jfreechart-plugin</artifactId>
diff --git a/plugins/json/pom.xml b/plugins/json/pom.xml
index 5a6012acf..1fa42d6d0 100644
--- a/plugins/json/pom.xml
+++ b/plugins/json/pom.xml
@@ -24,7 +24,7 @@
     <parent>
         <groupId>org.apache.struts</groupId>
         <artifactId>struts2-plugins</artifactId>
-        <version>6.5.0</version>
+        <version>6.6.0-SNAPSHOT</version>
     </parent>
 
     <artifactId>struts2-json-plugin</artifactId>
diff --git a/plugins/junit/pom.xml b/plugins/junit/pom.xml
index 2582bfa8f..6c16187c9 100644
--- a/plugins/junit/pom.xml
+++ b/plugins/junit/pom.xml
@@ -24,7 +24,7 @@
     <parent>
         <groupId>org.apache.struts</groupId>
         <artifactId>struts2-plugins</artifactId>
-        <version>6.5.0</version>
+        <version>6.6.0-SNAPSHOT</version>
     </parent>
 
     <artifactId>struts2-junit-plugin</artifactId>
diff --git a/plugins/osgi/pom.xml b/plugins/osgi/pom.xml
index 3cb69e200..45b9f5728 100644
--- a/plugins/osgi/pom.xml
+++ b/plugins/osgi/pom.xml
@@ -24,7 +24,7 @@
     <parent>
         <groupId>org.apache.struts</groupId>
         <artifactId>struts2-plugins</artifactId>
-        <version>6.5.0</version>
+        <version>6.6.0-SNAPSHOT</version>
     </parent>
 
     <artifactId>struts2-osgi-plugin</artifactId>
diff --git a/plugins/oval/pom.xml b/plugins/oval/pom.xml
index 7b673b9d2..9ceead177 100644
--- a/plugins/oval/pom.xml
+++ b/plugins/oval/pom.xml
@@ -24,7 +24,7 @@
     <parent>
         <groupId>org.apache.struts</groupId>
         <artifactId>struts2-plugins</artifactId>
-        <version>6.5.0</version>
+        <version>6.6.0-SNAPSHOT</version>
     </parent>
 
     <artifactId>struts2-oval-plugin</artifactId>
diff --git a/plugins/pell-multipart/pom.xml b/plugins/pell-multipart/pom.xml
index dfa0e9a39..67bbd3f4e 100644
--- a/plugins/pell-multipart/pom.xml
+++ b/plugins/pell-multipart/pom.xml
@@ -24,7 +24,7 @@
     <parent>
         <groupId>org.apache.struts</groupId>
         <artifactId>struts2-plugins</artifactId>
-        <version>6.5.0</version>
+        <version>6.6.0-SNAPSHOT</version>
     </parent>
 
     <artifactId>struts2-pell-multipart-plugin</artifactId>
diff --git a/plugins/plexus/pom.xml b/plugins/plexus/pom.xml
index a2b0d92bc..dbff6b0cd 100644
--- a/plugins/plexus/pom.xml
+++ b/plugins/plexus/pom.xml
@@ -24,7 +24,7 @@
     <parent>
         <groupId>org.apache.struts</groupId>
         <artifactId>struts2-plugins</artifactId>
-        <version>6.5.0</version>
+        <version>6.6.0-SNAPSHOT</version>
     </parent>
 
     <artifactId>struts2-plexus-plugin</artifactId>
diff --git a/plugins/pom.xml b/plugins/pom.xml
index fc6552cb8..2decc59c9 100644
--- a/plugins/pom.xml
+++ b/plugins/pom.xml
@@ -24,7 +24,7 @@
     <parent>
         <groupId>org.apache.struts</groupId>
         <artifactId>struts2-parent</artifactId>
-        <version>6.5.0</version>
+        <version>6.6.0-SNAPSHOT</version>
     </parent>
 
     <artifactId>struts2-plugins</artifactId>
diff --git a/plugins/portlet-junit/pom.xml b/plugins/portlet-junit/pom.xml
index 67edeb922..197342132 100644
--- a/plugins/portlet-junit/pom.xml
+++ b/plugins/portlet-junit/pom.xml
@@ -24,7 +24,7 @@
     <parent>
         <groupId>org.apache.struts</groupId>
         <artifactId>struts2-plugins</artifactId>
-        <version>6.5.0</version>
+        <version>6.6.0-SNAPSHOT</version>
     </parent>
 
     <artifactId>struts2-portlet-junit-plugin</artifactId>
diff --git a/plugins/portlet-mocks/pom.xml b/plugins/portlet-mocks/pom.xml
index 3a6e0c767..5bdde386d 100644
--- a/plugins/portlet-mocks/pom.xml
+++ b/plugins/portlet-mocks/pom.xml
@@ -24,7 +24,7 @@
     <parent>
         <groupId>org.apache.struts</groupId>
         <artifactId>struts2-plugins</artifactId>
-        <version>6.5.0</version>
+        <version>6.6.0-SNAPSHOT</version>
     </parent>
 
     <artifactId>struts2-portlet-mocks-plugin</artifactId>
diff --git a/plugins/portlet-tiles/pom.xml b/plugins/portlet-tiles/pom.xml
index 0151a39d8..701ebcc9b 100644
--- a/plugins/portlet-tiles/pom.xml
+++ b/plugins/portlet-tiles/pom.xml
@@ -24,7 +24,7 @@
     <parent>
         <groupId>org.apache.struts</groupId>
         <artifactId>struts2-plugins</artifactId>
-        <version>6.5.0</version>
+        <version>6.6.0-SNAPSHOT</version>
     </parent>
 
     <artifactId>struts2-portlet-tiles-plugin</artifactId>
diff --git a/plugins/portlet/pom.xml b/plugins/portlet/pom.xml
index 4f7740c6a..a222f6148 100644
--- a/plugins/portlet/pom.xml
+++ b/plugins/portlet/pom.xml
@@ -24,7 +24,7 @@
     <parent>
         <groupId>org.apache.struts</groupId>
         <artifactId>struts2-plugins</artifactId>
-        <version>6.5.0</version>
+        <version>6.6.0-SNAPSHOT</version>
     </parent>
 
     <artifactId>struts2-portlet-plugin</artifactId>
diff --git a/plugins/rest/pom.xml b/plugins/rest/pom.xml
index 096bfd626..3dc209ac2 100644
--- a/plugins/rest/pom.xml
+++ b/plugins/rest/pom.xml
@@ -24,7 +24,7 @@
     <parent>
         <groupId>org.apache.struts</groupId>
         <artifactId>struts2-plugins</artifactId>
-        <version>6.5.0</version>
+        <version>6.6.0-SNAPSHOT</version>
     </parent>
 
     <artifactId>struts2-rest-plugin</artifactId>
diff --git a/plugins/sitemesh/pom.xml b/plugins/sitemesh/pom.xml
index 144761949..82526780f 100644
--- a/plugins/sitemesh/pom.xml
+++ b/plugins/sitemesh/pom.xml
@@ -24,7 +24,7 @@
     <parent>
         <groupId>org.apache.struts</groupId>
         <artifactId>struts2-plugins</artifactId>
-        <version>6.5.0</version>
+        <version>6.6.0-SNAPSHOT</version>
     </parent>
 
     <artifactId>struts2-sitemesh-plugin</artifactId>
diff --git a/plugins/spring/pom.xml b/plugins/spring/pom.xml
index 679e77d82..edd9a2160 100644
--- a/plugins/spring/pom.xml
+++ b/plugins/spring/pom.xml
@@ -24,7 +24,7 @@
     <parent>
         <groupId>org.apache.struts</groupId>
         <artifactId>struts2-plugins</artifactId>
-        <version>6.5.0</version>
+        <version>6.6.0-SNAPSHOT</version>
     </parent>
 
     <artifactId>struts2-spring-plugin</artifactId>
diff --git a/plugins/testng/pom.xml b/plugins/testng/pom.xml
index eb74c4465..45f9b9476 100644
--- a/plugins/testng/pom.xml
+++ b/plugins/testng/pom.xml
@@ -24,7 +24,7 @@
     <parent>
         <groupId>org.apache.struts</groupId>
         <artifactId>struts2-plugins</artifactId>
-        <version>6.5.0</version>
+        <version>6.6.0-SNAPSHOT</version>
     </parent>
 
     <artifactId>struts2-testng-plugin</artifactId>
diff --git a/plugins/tiles/pom.xml b/plugins/tiles/pom.xml
index a0cf0bae1..b88b807c8 100644
--- a/plugins/tiles/pom.xml
+++ b/plugins/tiles/pom.xml
@@ -24,7 +24,7 @@
     <parent>
         <groupId>org.apache.struts</groupId>
         <artifactId>struts2-plugins</artifactId>
-        <version>6.5.0</version>
+        <version>6.6.0-SNAPSHOT</version>
     </parent>
 
     <artifactId>struts2-tiles-plugin</artifactId>
diff --git a/plugins/velocity/pom.xml b/plugins/velocity/pom.xml
index 9174e54ac..804ae096c 100644
--- a/plugins/velocity/pom.xml
+++ b/plugins/velocity/pom.xml
@@ -24,7 +24,7 @@
     <parent>
         <groupId>org.apache.struts</groupId>
         <artifactId>struts2-plugins</artifactId>
-        <version>6.5.0</version>
+        <version>6.6.0-SNAPSHOT</version>
     </parent>
 
     <artifactId>struts2-velocity-plugin</artifactId>
diff --git a/plugins/xslt/pom.xml b/plugins/xslt/pom.xml
index c5a8968d4..fe49f299e 100644
--- a/plugins/xslt/pom.xml
+++ b/plugins/xslt/pom.xml
@@ -24,7 +24,7 @@
     <parent>
         <groupId>org.apache.struts</groupId>
         <artifactId>struts2-plugins</artifactId>
-        <version>6.5.0</version>
+        <version>6.6.0-SNAPSHOT</version>
     </parent>
 
     <artifactId>struts2-xslt-plugin</artifactId>
diff --git a/pom.xml b/pom.xml
index ad320398f..854f75632 100644
--- a/pom.xml
+++ b/pom.xml
@@ -29,7 +29,7 @@
 
     <modelVersion>4.0.0</modelVersion>
     <artifactId>struts2-parent</artifactId>
-    <version>6.5.0</version>
+    <version>6.6.0-SNAPSHOT</version>
     <packaging>pom</packaging>
     <name>Struts 2</name>
     <url>https://struts.apache.org/</url>
@@ -51,7 +51,7 @@
         <connection>scm:git:https://gitbox.apache.org/repos/asf/struts.git</connection>
         <developerConnection>scm:git:https://gitbox.apache.org/repos/asf/struts.git</developerConnection>
         <url>https://github.com/apache/struts/</url>
-        <tag>STRUTS_6_5_0</tag>
+        <tag>STRUTS_6_3_0_1</tag>
     </scm>
 
     <issueManagement>
@@ -104,7 +104,7 @@
 
     <properties>
         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
-        <project.build.outputTimestamp>2024-07-12T05:22:09Z</project.build.outputTimestamp>
+        <project.build.outputTimestamp>2024-07-12T05:27:19Z</project.build.outputTimestamp>
         <maven.compiler.source>1.8</maven.compiler.source>
         <maven.compiler.target>1.8</maven.compiler.target>