diff --git a/src/js/_enqueues/wp/updates.js b/src/js/_enqueues/wp/updates.js
index c6d0ff56f2..d43561ee1a 100644
--- a/src/js/_enqueues/wp/updates.js
+++ b/src/js/_enqueues/wp/updates.js
@@ -2654,7 +2654,7 @@
 					sprintf(
 						/* translators: %s: Search query. */
 						__( 'Search results for: %s' ),
-						'<strong>' + _.escape( data.s ) + '</strong>'
+						'<strong>' + _.escape( decodeURIComponent( data.s ) ) + '</strong>'
 					) ),
 					$oldSubTitle = $( '.wrap .subtitle' );
 
diff --git a/src/wp-admin/includes/class-wp-plugins-list-table.php b/src/wp-admin/includes/class-wp-plugins-list-table.php
index cad2df794c..4b81be9a3e 100644
--- a/src/wp-admin/includes/class-wp-plugins-list-table.php
+++ b/src/wp-admin/includes/class-wp-plugins-list-table.php
@@ -403,7 +403,7 @@ class WP_Plugins_List_Table extends WP_List_Table {
 		global $plugins;
 
 		if ( ! empty( $_REQUEST['s'] ) ) {
-			$s = esc_html( wp_unslash( $_REQUEST['s'] ) );
+			$s = esc_html( urldecode( wp_unslash( $_REQUEST['s'] ) ) );
 
 			/* translators: %s: Plugin search term. */
 			printf( __( 'No plugins found for: %s.' ), '<strong>' . $s . '</strong>' );