Index: wp-admin\includes\class-wp-media-list-table.php
--- wp-admin\includes\class-wp-media-list-table.php Base (BASE)
+++ wp-admin\includes\class-wp-media-list-table.php Locally Modified (Based On LOCAL)
@@ -208,7 +208,7 @@
 
 	<div class="search-form">
 		<label for="media-search-input" class="screen-reader-text"><?php esc_html_e( 'Search Media' ); ?></label>
-		<input type="search" placeholder="Search" id="media-search-input" class="search" name="s" value="<?php _admin_search_query(); ?>"></div>
+		<input type="search" placeholder="<?php esc_attr_e( 'Search' ) ?>" id="media-search-input" class="search" name="s" value="<?php _admin_search_query(); ?>"></div>
 	</div>
 	<?php
 	}