diff --git a/wp-admin/includes/plugin-install.php b/wp-admin/includes/plugin-install.php
index e2c8de32f8..8bb1b61072 100644
--- a/wp-admin/includes/plugin-install.php
+++ b/wp-admin/includes/plugin-install.php
@@ -316,7 +316,7 @@ function install_dashboard() {
  */
 function install_search_form( $deprecated = true ) {
 	$type = isset( $_REQUEST['type'] ) ? wp_unslash( $_REQUEST['type'] ) : 'term';
-	$term = isset( $_REQUEST['s'] ) ? wp_unslash( $_REQUEST['s'] ) : '';
+	$term = isset( $_REQUEST['s'] ) ? urldecode( wp_unslash( $_REQUEST['s'] ) ) : '';
 	?>
 	<form class="search-form search-plugins" method="get">
 		<input type="hidden" name="tab" value="search" />
diff --git a/wp-includes/version.php b/wp-includes/version.php
index 8a81de1070..fb2000c0c2 100644
--- a/wp-includes/version.php
+++ b/wp-includes/version.php
@@ -16,7 +16,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '6.4-alpha-56445';
+$wp_version = '6.4-alpha-56446';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.