diff --git src/wp-admin/includes/media.php src/wp-admin/includes/media.php
index ba38188..b461eae 100644
--- src/wp-admin/includes/media.php
+++ src/wp-admin/includes/media.php
@@ -2679,12 +2679,23 @@ function edit_form_image_editor( $post ) {
 
 	<?php
 		$quicktags_settings = array( 'buttons' => 'strong,em,link,block,del,ins,img,ul,ol,li,code,close' );
-		$editor_args = array(
-			'textarea_name' => 'content',
-			'textarea_rows' => 5,
-			'media_buttons' => false,
-			'tinymce' => false,
-			'quicktags' => $quicktags_settings,
+
+		/**
+		 * Filter the wp_editor() settings for the attachment description field.
+		 *
+		 * @since 3.9.0
+		 *
+		 * @param array $args Accepts array of parameters for wp_editor().
+		 *                    See docs for wp_editor() for details.
+		 */
+		$editor_args = apply_filters( 'attachment_description_editor_args',
+			array(
+				'textarea_name' => 'content',
+				'textarea_rows' => 5,
+				'media_buttons' => false,
+				'tinymce' => false,
+				'quicktags' => $quicktags_settings,
+			)
 		);
 	?>