diff --git a/includes/Component/Component.php b/includes/Component/Component.php
new file mode 100644
index 00000000..0d7dc365
--- /dev/null
+++ b/includes/Component/Component.php
@@ -0,0 +1,50 @@
+<?php declare( strict_types = 1 );
+
+namespace lloc\Msls\Component;
+
+/**
+ * Abstract class Input
+ *
+ * @package lloc\Msls\Component
+ */
+abstract class Component {
+
+	const INPUT_PREFIX = 'msls_input_';
+
+	const ALLOWED_HTML = array(
+		'label'  => array(
+			'for' => array(),
+		),
+		'option' => array(
+			'value'    => array(),
+			'selected' => array(),
+		),
+		'select' => array(
+			'id'   => array(),
+			'name' => array(),
+		),
+		'input'  => array(
+			'type'     => array(),
+			'class'    => array(),
+			'id'       => array(),
+			'name'     => array(),
+			'value'    => array(),
+			'size'     => array(),
+			'readonly' => array(),
+		),
+	);
+
+	/**
+	 * @return string
+	 */
+	abstract public function render(): string;
+
+	/**
+	 * Adds our input elements to the allowed HTML elements of a post
+	 */
+	public static function get_allowed_html(): array {
+		$my_allowed = wp_kses_allowed_html( 'post' );
+
+		return array_merge( $my_allowed, self::ALLOWED_HTML );
+	}
+}
diff --git a/includes/Component/Icon.php b/includes/Component/Icon.php
index dfc4134b..b10c6489 100644
--- a/includes/Component/Icon.php
+++ b/includes/Component/Icon.php
@@ -1,9 +1,10 @@
-<?php
+<?php declare( strict_types = 1 );
 
 namespace lloc\Msls\Component;
 
 /**
  * Class Icon
+ *
  * @package lloc\Msls\Component
  */
 abstract class Icon {
@@ -48,5 +49,4 @@ abstract protected function get_include(): string;
 	 * @return string
 	 */
 	abstract public function get( string $language ): string;
-
-}
\ No newline at end of file
+}
diff --git a/includes/Component/Icon/IconLabel.php b/includes/Component/Icon/IconLabel.php
index 49151fca..6387b0e0 100644
--- a/includes/Component/Icon/IconLabel.php
+++ b/includes/Component/Icon/IconLabel.php
@@ -1,4 +1,4 @@
-<?php
+<?php declare( strict_types = 1 );
 
 namespace lloc\Msls\Component\Icon;
 
@@ -10,7 +10,7 @@
  *
  * @package lloc\Msls\Component
  */
-class IconLabel extends Icon {
+final class IconLabel extends Icon {
 
 	/**
 	 * @return string
diff --git a/includes/Component/Icon/IconPng.php b/includes/Component/Icon/IconPng.php
index 3912e8a0..f27903fb 100644
--- a/includes/Component/Icon/IconPng.php
+++ b/includes/Component/Icon/IconPng.php
@@ -1,4 +1,4 @@
-<?php
+<?php declare( strict_types = 1 );
 
 namespace lloc\Msls\Component\Icon;
 
@@ -7,9 +7,10 @@
 
 /**
  * Class IconPng
+ *
  * @package lloc\Msls\Component
  */
-class IconPng extends Icon {
+final class IconPng extends Icon {
 
 	const FLAGS_FILE = 'flags/flags.php';
 
@@ -28,5 +29,4 @@ protected function get_include(): string {
 	public function get( string $language ): string {
 		return $this->map[ $language ] ?? $this->maybe( $language, '', '.png' );
 	}
-
-}
\ No newline at end of file
+}
diff --git a/includes/Component/Icon/IconSvg.php b/includes/Component/Icon/IconSvg.php
index 631d7c62..8ef0a60b 100644
--- a/includes/Component/Icon/IconSvg.php
+++ b/includes/Component/Icon/IconSvg.php
@@ -1,4 +1,4 @@
-<?php
+<?php declare( strict_types = 1 );
 
 namespace lloc\Msls\Component\Icon;
 
@@ -7,9 +7,10 @@
 
 /**
  * Class IconSvg
+ *
  * @package lloc\Msls\Component
  */
-class IconSvg extends Icon {
+final class IconSvg extends Icon {
 
 	const FLAGS_FILE = 'css-flags/flags.php';
 
@@ -28,5 +29,4 @@ protected function get_include(): string {
 	public function get( string $language ): string {
 		return $this->map[ $language ] ?? $this->maybe( $language, 'flag-icon-' );
 	}
-
-}
\ No newline at end of file
+}
diff --git a/includes/Component/Input/Checkbox.php b/includes/Component/Input/Checkbox.php
index 5a1072ac..11aba33c 100644
--- a/includes/Component/Input/Checkbox.php
+++ b/includes/Component/Input/Checkbox.php
@@ -1,15 +1,15 @@
-<?php
+<?php declare( strict_types = 1 );
 
 namespace lloc\Msls\Component\Input;
 
-use lloc\Msls\Component\InputInterface;
+use lloc\Msls\Component\Component;
 
 /**
  * Class Checkbox
  *
  * @package lloc\Msls\Component\Input
  */
-class Checkbox implements InputInterface {
+final class Checkbox extends Component {
 
 	/**
 	 * @var string
diff --git a/includes/Component/Input/Group.php b/includes/Component/Input/Group.php
index 8f1a8841..ee684653 100644
--- a/includes/Component/Input/Group.php
+++ b/includes/Component/Input/Group.php
@@ -1,19 +1,18 @@
-<?php
-
+<?php declare( strict_types = 1 );
 
 namespace lloc\Msls\Component\Input;
 
-use lloc\Msls\Component\InputInterface;
+use lloc\Msls\Component\Component;
 
 /**
  * Class Options
  *
  * @package lloc\Msls\Component\Input
  */
-class Group implements InputInterface {
+final class Group extends Component {
 
 	/**
-	 * @var InputInterface[]
+	 * @var Component[]
 	 */
 	protected $arr = array();
 
@@ -32,11 +31,11 @@ public function __construct( string $glue = ' ' ) {
 	}
 
 	/**
-	 * @param InputInterface $input
+	 * @param Component $input
 	 *
 	 * @return self
 	 */
-	public function add( InputInterface $input ): self {
+	public function add( Component $input ): self {
 		$this->arr[] = $input;
 
 		return $this;
@@ -47,7 +46,7 @@ public function add( InputInterface $input ): self {
 	 */
 	public function render(): string {
 		$items = array_map(
-			function ( InputInterface $input ) {
+			function ( Component $input ) {
 				return $input->render(); // phpcs:ignore WordPress.Security.EscapeOutput
 			},
 			$this->arr
diff --git a/includes/Component/Input/Label.php b/includes/Component/Input/Label.php
index a32d497f..61c26b76 100644
--- a/includes/Component/Input/Label.php
+++ b/includes/Component/Input/Label.php
@@ -1,15 +1,15 @@
-<?php
+<?php declare( strict_types = 1 );
 
 namespace lloc\Msls\Component\Input;
 
-use lloc\Msls\Component\InputInterface;
+use lloc\Msls\Component\Component;
 
 /**
  * Class Label
  *
  * @package lloc\Msls\Component\Input
  */
-class Label implements InputInterface {
+final class Label extends Component {
 
 	/**
 	 * @var string
diff --git a/includes/Component/Input/Option.php b/includes/Component/Input/Option.php
index 4343bb9f..65d46b91 100644
--- a/includes/Component/Input/Option.php
+++ b/includes/Component/Input/Option.php
@@ -1,15 +1,15 @@
-<?php
+<?php declare( strict_types = 1 );
 
 namespace lloc\Msls\Component\Input;
 
-use lloc\Msls\Component\InputInterface;
+use lloc\Msls\Component\Component;
 
 /**
  * Class Option
  *
  * @package lloc\Msls\Component\Input
  */
-class Option implements InputInterface {
+final class Option extends Component {
 
 	/**
 	 * @var string
diff --git a/includes/Component/Input/Select.php b/includes/Component/Input/Select.php
index eb4d465a..e6301df8 100644
--- a/includes/Component/Input/Select.php
+++ b/includes/Component/Input/Select.php
@@ -1,10 +1,10 @@
-<?php
+<?php declare( strict_types = 1 );
 
 namespace lloc\Msls\Component\Input;
 
-use lloc\Msls\Component\InputInterface;
+use lloc\Msls\Component\Component;
 
-class Select implements InputInterface {
+final class Select extends Component {
 
 	const RENDER_FILTER = 'msls_input_select_name';
 
@@ -28,7 +28,7 @@ public function __construct( string $key, array $arr, ?string $selected = null )
 
 		$this->options = new Group( '' );
 		foreach ( $arr as $key => $value ) {
-			$this->options->add( new Option( $key, strval( $value ), $selected ) );
+			$this->options->add( new Option( strval( $key ), strval( $value ), $selected ) );
 		}
 	}
 
diff --git a/includes/Component/Input/Text.php b/includes/Component/Input/Text.php
index 363fbb3a..16573bca 100644
--- a/includes/Component/Input/Text.php
+++ b/includes/Component/Input/Text.php
@@ -1,11 +1,10 @@
-<?php
-
+<?php declare( strict_types = 1 );
 
 namespace lloc\Msls\Component\Input;
 
-use lloc\Msls\Component\InputInterface;
+use lloc\Msls\Component\Component;
 
-class Text implements InputInterface {
+final class Text extends Component {
 
 	const DEFAULT_SIZE = 30;
 
diff --git a/includes/Component/InputInterface.php b/includes/Component/InputInterface.php
deleted file mode 100644
index c8f3e340..00000000
--- a/includes/Component/InputInterface.php
+++ /dev/null
@@ -1,18 +0,0 @@
-<?php
-
-namespace lloc\Msls\Component;
-
-/**
- * Interface Input
- *
- * @package lloc\Msls\Component
- */
-interface InputInterface {
-
-	const INPUT_PREFIX = 'msls_input_';
-
-	/**
-	 * @return string
-	 */
-	public function render(): string;
-}
diff --git a/includes/Component/Wrapper.php b/includes/Component/Wrapper.php
index 995a0f74..55e1a1a4 100644
--- a/includes/Component/Wrapper.php
+++ b/includes/Component/Wrapper.php
@@ -2,7 +2,7 @@
 
 namespace lloc\Msls\Component;
 
-class Wrapper {
+final class Wrapper extends Component {
 
 	protected string $element;
 
@@ -14,6 +14,6 @@ public function __construct( string $element, string $content ) {
 	}
 
 	public function render(): string {
-		return sprintf( '<%1$s>%2$s</%1$s>', esc_html( $this->element ), wp_kses_post( $this->content ) );
+		return sprintf( '<%1$s>%2$s</%1$s>', esc_html( $this->element ), wp_kses( $this->content, self::get_allowed_html() ) );
 	}
 }
diff --git a/includes/ContentImport/LogWriters/AdminNoticeLogger.php b/includes/ContentImport/LogWriters/AdminNoticeLogger.php
index f760770e..2fe55013 100644
--- a/includes/ContentImport/LogWriters/AdminNoticeLogger.php
+++ b/includes/ContentImport/LogWriters/AdminNoticeLogger.php
@@ -2,6 +2,7 @@
 
 namespace lloc\Msls\ContentImport\LogWriters;
 
+use lloc\Msls\Component\Component;
 use lloc\Msls\ContentImport\ImportCoordinates;
 use lloc\Msls\MslsRegistryInstance;
 
@@ -141,7 +142,7 @@ public function show_last_log( $echo = true ): ?string {
 		}
 
 		if ( $echo ) {
-			echo wp_kses_post( $html );
+			echo wp_kses( $html, Component::get_allowed_html() );
 		}
 
 		// we've shown it, no reason to keep it
diff --git a/includes/ContentImport/MetaBox.php b/includes/ContentImport/MetaBox.php
index 10a25f08..0e527363 100644
--- a/includes/ContentImport/MetaBox.php
+++ b/includes/ContentImport/MetaBox.php
@@ -2,6 +2,7 @@
 
 namespace lloc\Msls\ContentImport;
 
+use lloc\Msls\Component\Component;
 use lloc\Msls\Component\Wrapper;
 use lloc\Msls\ContentImport\Importers\Map;
 use lloc\Msls\MslsBlogCollection;
@@ -86,7 +87,7 @@ function ( $lang ) use ( $mydata ) {
 			$output = ( new Wrapper( 'p', $warning ) )->render();
 		}
 
-		echo wp_kses_post( $output );
+		echo wp_kses( $output, Component::get_allowed_html() );
 	}
 
 	protected function inline_thickbox_url( array $data = array() ): string {
@@ -172,7 +173,7 @@ protected function inline_thickbox_html( $echo = true, array $data = array() ):
 		$html = ob_get_clean();
 
 		if ( $echo ) {
-			echo wp_kses_post( $html );
+			echo wp_kses( $html, Component::get_allowed_html() );
 		}
 
 		return $html;
diff --git a/includes/MslsCustomColumn.php b/includes/MslsCustomColumn.php
index e83c79a5..5876c49f 100644
--- a/includes/MslsCustomColumn.php
+++ b/includes/MslsCustomColumn.php
@@ -2,6 +2,8 @@
 
 namespace lloc\Msls;
 
+use lloc\Msls\Component\Component;
+
 /**
  * Handling of existing/not existing translations in the backend listings of
  * various post types
@@ -94,7 +96,7 @@ public function td( $column_name, $item_id ): void {
 					printf(
 						'<span class="msls-icon-wrapper %1$s">%2$s</span>',
 						esc_attr( $this->options->get_icon_type() ),
-						wp_kses_post( $icon->get_a() )
+						wp_kses( $icon->get_a(), Component::get_allowed_html() )
 					);
 
 					restore_current_blog();
diff --git a/includes/MslsMain.php b/includes/MslsMain.php
index e0b003ca..b57e88fe 100644
--- a/includes/MslsMain.php
+++ b/includes/MslsMain.php
@@ -2,7 +2,7 @@
 
 namespace lloc\Msls;
 
-use lloc\Msls\Component\InputInterface;
+use lloc\Msls\Component\Component;
 
 /**
  * Abstraction for the hook classes
@@ -75,9 +75,9 @@ public function get_input_array( $object_id ): array {
 			return $arr;
 		}
 
-		$offset = strlen( InputInterface::INPUT_PREFIX );
+		$offset = strlen( Component::INPUT_PREFIX );
 		foreach ( $input_post as $key => $value ) {
-			if ( false === strpos( $key, InputInterface::INPUT_PREFIX ) || empty( $value ) ) {
+			if ( false === strpos( $key, Component::INPUT_PREFIX ) || empty( $value ) ) {
 				continue;
 			}
 
diff --git a/includes/MslsMetaBox.php b/includes/MslsMetaBox.php
index df1a8a83..0ae6e7ac 100644
--- a/includes/MslsMetaBox.php
+++ b/includes/MslsMetaBox.php
@@ -2,7 +2,7 @@
 
 namespace lloc\Msls;
 
-use lloc\Msls\Component\InputInterface;
+use lloc\Msls\Component\Component;
 use lloc\Msls\Component\Wrapper;
 use lloc\Msls\ContentImport\MetaBox as ContentImportMetaBox;
 
@@ -186,7 +186,7 @@ public function render_select(): void {
 					$args = array(
 						'post_type'         => $type,
 						'selected'          => $mydata->$language,
-						'name'              => InputInterface::INPUT_PREFIX . $language,
+						'name'              => Component::INPUT_PREFIX . $language,
 						'show_option_none'  => ' ',
 						'option_none_value' => 0,
 						'sort_column'       => 'menu_order, post_title',
@@ -270,13 +270,14 @@ public function render_options( $type, $msls_id ): string {
 	 * @return string
 	 */
 	public function render_option( int $post_id, int $msls_id ): string {
-		return wp_kses_post(
+		return wp_kses(
 			sprintf(
 				'<option value="%d" %s>%s</option>',
 				esc_attr( $post_id ),
 				selected( $post_id, $msls_id, false ),
 				get_the_title( $post_id )
-			)
+			),
+			Component::get_allowed_html()
 		);
 	}
 
@@ -323,12 +324,13 @@ public function render_input(): void {
 				restore_current_blog();
 			}
 
-			echo wp_kses_post(
+			echo wp_kses(
 				sprintf(
 					'<ul>%s</ul><input type="hidden" name="msls_post_type" id="msls_post_type" value="%s"/><input type="hidden" name="msls_action" id="msls_action" value="suggest_posts"/>',
 					$items,
 					$post_type
-				)
+				),
+				Component::get_allowed_html()
 			);
 
 			$post = $temp;
diff --git a/includes/MslsPostTagClassic.php b/includes/MslsPostTagClassic.php
index 0d894c60..b1d55a83 100644
--- a/includes/MslsPostTagClassic.php
+++ b/includes/MslsPostTagClassic.php
@@ -77,7 +77,7 @@ public function the_input( ?\WP_Term $tag, string $title_format, string $item_fo
 
 			$this->maybe_set_linked_term( $mydata );
 
-			printf( wp_kses_post( $title_format ), esc_html( $this->get_select_title() ) );
+			printf( wp_kses( $title_format ), esc_html( $this->get_select_title() ) );
 
 			foreach ( $blogs as $blog ) {
 				$this->print_option( $blog, $type, $mydata, $item_format );
diff --git a/includes/MslsWidget.php b/includes/MslsWidget.php
index ac85fbae..e0f2b9d1 100644
--- a/includes/MslsWidget.php
+++ b/includes/MslsWidget.php
@@ -8,6 +8,8 @@
 
 namespace lloc\Msls;
 
+use lloc\Msls\Component\Component;
+
 /**
  * The standard widget of the Multisite Language Switcher
  *
@@ -60,7 +62,10 @@ public function widget( $args, $instance ) {
 			$content = apply_filters( 'msls_widget_alternative_content', $text );
 		}
 
-		echo wp_kses_post( $args['before_widget'] . $title . $content . $args['after_widget'] );
+		echo wp_kses(
+			$args['before_widget'] . $title . $content . $args['after_widget'],
+			Component::get_allowed_html()
+		);
 	}
 
 	/**
@@ -95,7 +100,7 @@ public function form( $instance ) {
 			( isset( $instance['title'] ) ? esc_attr( $instance['title'] ) : '' )
 		);
 
-		echo wp_kses_post( $form );
+		echo wp_kses( $form, Component::get_allowed_html() );
 
 		return $form;
 	}
diff --git a/tests/phpunit/MslsUnitTestCase.php b/tests/phpunit/MslsUnitTestCase.php
index 6e2ed13f..984a92d1 100644
--- a/tests/phpunit/MslsUnitTestCase.php
+++ b/tests/phpunit/MslsUnitTestCase.php
@@ -29,6 +29,7 @@ protected function setUp(): void {
 		Functions\when( 'wp_kses' )->returnArg();
 		Functions\when( 'wp_kses_post' )->returnArg();
 		Functions\when( 'sanitize_text_field' )->returnArg();
+		Functions\when( 'wp_kses_allowed_html' )->justReturn( array() );
 	}
 
 	protected function tearDown(): void {