diff --git a/packages/create-block-interactive-template/plugin-templates/$slug.php.mustache b/packages/create-block-interactive-template/plugin-templates/$slug.php.mustache
index 2322881ab0d710..52c9c4966646fa 100644
--- a/packages/create-block-interactive-template/plugin-templates/$slug.php.mustache
+++ b/packages/create-block-interactive-template/plugin-templates/$slug.php.mustache
@@ -30,6 +30,10 @@
  * @package           {{namespace}}
  */
 
+if ( ! defined( 'ABSPATH' ) ) {
+	exit; // Exit if accessed directly.
+}
+
 /**
  * Registers the block using the metadata loaded from the `block.json` file.
  * Behind the scenes, it registers also all assets so they can be enqueued
diff --git a/packages/create-block-tutorial-template/plugin-templates/$slug.php.mustache b/packages/create-block-tutorial-template/plugin-templates/$slug.php.mustache
index 2322881ab0d710..52c9c4966646fa 100644
--- a/packages/create-block-tutorial-template/plugin-templates/$slug.php.mustache
+++ b/packages/create-block-tutorial-template/plugin-templates/$slug.php.mustache
@@ -30,6 +30,10 @@
  * @package           {{namespace}}
  */
 
+if ( ! defined( 'ABSPATH' ) ) {
+	exit; // Exit if accessed directly.
+}
+
 /**
  * Registers the block using the metadata loaded from the `block.json` file.
  * Behind the scenes, it registers also all assets so they can be enqueued
diff --git a/packages/create-block/lib/templates/es5/$slug.php.mustache b/packages/create-block/lib/templates/es5/$slug.php.mustache
index a04553af1e7d8b..0f64471e434a7f 100644
--- a/packages/create-block/lib/templates/es5/$slug.php.mustache
+++ b/packages/create-block/lib/templates/es5/$slug.php.mustache
@@ -30,6 +30,10 @@
  * @package           {{namespace}}
  */
 
+if ( ! defined( 'ABSPATH' ) ) {
+	exit; // Exit if accessed directly.
+}
+
 /**
  * Registers all block assets so that they can be enqueued through the block editor
  * in the corresponding context.
diff --git a/packages/create-block/lib/templates/plugin/$slug.php.mustache b/packages/create-block/lib/templates/plugin/$slug.php.mustache
index 2ed0354314cc47..90f293f1472f4e 100644
--- a/packages/create-block/lib/templates/plugin/$slug.php.mustache
+++ b/packages/create-block/lib/templates/plugin/$slug.php.mustache
@@ -30,6 +30,10 @@
  * @package           {{namespace}}
  */
 
+if ( ! defined( 'ABSPATH' ) ) {
+	exit; // Exit if accessed directly.
+}
+
 /**
  * Registers the block using the metadata loaded from the `block.json` file.
  * Behind the scenes, it registers also all assets so they can be enqueued