diff --git a/src/wp-includes/class-wp-block-supports.php b/src/wp-includes/class-wp-block-supports.php
index a14efa36bd603..f67c62f070627 100644
--- a/src/wp-includes/class-wp-block-supports.php
+++ b/src/wp-includes/class-wp-block-supports.php
@@ -67,6 +67,18 @@ public static function init() {
 		$instance->register_attributes();
 	}
 
+	/**
+	 * Applies the render_block filter.
+	 *
+	 * @param  string $block_content Rendered block content.
+	 * @param  array  $block         Block object.
+	 * @return string                Filtered block content.
+	 */
+	public static function render( $block_content, $block ) {
+		$instance = self::get_instance();
+		return $instance->render_block_supports( $block_content, $block );
+	}
+
 	/**
 	 * Registers a block support.
 	 *
@@ -155,6 +167,37 @@ private function register_attributes() {
 			}
 		}
 	}
+
+	/**
+	 * Modify the rendered block content with additional filters.
+	 *
+	 * @param  string $block_content Rendered block content.
+	 * @param  array  $block         Block object.
+	 * @return string                Filtered block content.
+	 */
+	public function render_block_supports( $block_content, $block ) {
+		$block_type       = WP_Block_Type_Registry::get_instance()->get_registered( $block['blockName'] );
+		$block_attributes = $block['attrs'];
+
+		if ( ! $block_type ) {
+			return $block_content;
+		}
+
+		foreach ( $this->block_supports as $name => $block_support_config ) {
+			if ( ! isset( $block_support_config['render_block'] ) ) {
+				continue;
+			}
+
+			$block_content = call_user_func(
+				$block_support_config['render_block'],
+				$block_type,
+				$block_attributes,
+				$block_content
+			);
+		}
+
+		return $block_content;
+	}
 }
 
 /**
diff --git a/src/wp-includes/default-filters.php b/src/wp-includes/default-filters.php
index e8e0a84d45eb3..c4e07e29cfb58 100644
--- a/src/wp-includes/default-filters.php
+++ b/src/wp-includes/default-filters.php
@@ -315,6 +315,7 @@
 add_action( 'init', '_register_core_block_patterns_and_categories' );
 add_action( 'init', 'check_theme_switched', 99 );
 add_action( 'init', array( 'WP_Block_Supports', 'init' ), 22 );
+add_filter( 'render_block', array( 'WP_Block_Supports', 'render' ), 10, 2 );
 add_action( 'after_switch_theme', '_wp_menus_changed' );
 add_action( 'after_switch_theme', '_wp_sidebars_changed' );
 add_action( 'wp_print_styles', 'print_emoji_styles' );