diff --git a/src/wp-admin/includes/class-wp-importer.php b/src/wp-admin/includes/class-wp-importer.php
index b9f652b85b..c5d400b77b 100644
--- a/src/wp-admin/includes/class-wp-importer.php
+++ b/src/wp-admin/includes/class-wp-importer.php
@@ -29,7 +29,7 @@ class WP_Importer {
 		// Grab all posts in chunks
 		do {
 			$meta_key = $importer_name . '_' . $bid . '_permalink';
-			$sql = $wpdb->prepare( "SELECT post_id, meta_value FROM $wpdb->postmeta WHERE meta_key = '%s' LIMIT %d,%d", $meta_key, $offset, $limit );
+			$sql = $wpdb->prepare( "SELECT post_id, meta_value FROM $wpdb->postmeta WHERE meta_key = %s LIMIT %d,%d", $meta_key, $offset, $limit );
 			$results = $wpdb->get_results( $sql );
 
 			// Increment offset
diff --git a/src/wp-admin/includes/nav-menu.php b/src/wp-admin/includes/nav-menu.php
index a6aac33053..9c4c6fb275 100644
--- a/src/wp-admin/includes/nav-menu.php
+++ b/src/wp-admin/includes/nav-menu.php
@@ -996,7 +996,7 @@ function _wp_delete_orphaned_draft_menu_items() {
 	$delete_timestamp = time() - ( DAY_IN_SECONDS * EMPTY_TRASH_DAYS );
 
 	// Delete orphaned draft menu items.
-	$menu_items_to_delete = $wpdb->get_col($wpdb->prepare("SELECT ID FROM $wpdb->posts AS p LEFT JOIN $wpdb->postmeta AS m ON p.ID = m.post_id WHERE post_type = 'nav_menu_item' AND post_status = 'draft' AND meta_key = '_menu_item_orphaned' AND meta_value < '%d'", $delete_timestamp ) );
+	$menu_items_to_delete = $wpdb->get_col($wpdb->prepare("SELECT ID FROM $wpdb->posts AS p LEFT JOIN $wpdb->postmeta AS m ON p.ID = m.post_id WHERE post_type = 'nav_menu_item' AND post_status = 'draft' AND meta_key = '_menu_item_orphaned' AND meta_value < %d", $delete_timestamp ) );
 
 	foreach ( (array) $menu_items_to_delete as $menu_item_id )
 		wp_delete_post( $menu_item_id, true );
diff --git a/src/wp-includes/functions.php b/src/wp-includes/functions.php
index b4fbb50cba..01d8a88bb4 100644
--- a/src/wp-includes/functions.php
+++ b/src/wp-includes/functions.php
@@ -4804,7 +4804,7 @@ function wp_scheduled_delete() {
 
 	$delete_timestamp = time() - ( DAY_IN_SECONDS * EMPTY_TRASH_DAYS );
 
-	$posts_to_delete = $wpdb->get_results($wpdb->prepare("SELECT post_id FROM $wpdb->postmeta WHERE meta_key = '_wp_trash_meta_time' AND meta_value < '%d'", $delete_timestamp), ARRAY_A);
+	$posts_to_delete = $wpdb->get_results($wpdb->prepare("SELECT post_id FROM $wpdb->postmeta WHERE meta_key = '_wp_trash_meta_time' AND meta_value < %d", $delete_timestamp), ARRAY_A);
 
 	foreach ( (array) $posts_to_delete as $post ) {
 		$post_id = (int) $post['post_id'];
@@ -4821,7 +4821,7 @@ function wp_scheduled_delete() {
 		}
 	}
 
-	$comments_to_delete = $wpdb->get_results($wpdb->prepare("SELECT comment_id FROM $wpdb->commentmeta WHERE meta_key = '_wp_trash_meta_time' AND meta_value < '%d'", $delete_timestamp), ARRAY_A);
+	$comments_to_delete = $wpdb->get_results($wpdb->prepare("SELECT comment_id FROM $wpdb->commentmeta WHERE meta_key = '_wp_trash_meta_time' AND meta_value < %d", $delete_timestamp), ARRAY_A);
 
 	foreach ( (array) $comments_to_delete as $comment ) {
 		$comment_id = (int) $comment['comment_id'];
diff --git a/src/wp-includes/taxonomy.php b/src/wp-includes/taxonomy.php
index 10f26d59ff..9ef427c1bd 100644
--- a/src/wp-includes/taxonomy.php
+++ b/src/wp-includes/taxonomy.php
@@ -3788,7 +3788,7 @@ function _wp_check_split_terms_in_menus( $term_id, $new_term_id, $term_taxonomy_
 			INNER JOIN {$wpdb->postmeta} AS m2 ON ( m2.post_id = m1.post_id )
 			INNER JOIN {$wpdb->postmeta} AS m3 ON ( m3.post_id = m1.post_id )
 		WHERE ( m1.meta_key = '_menu_item_type' AND m1.meta_value = 'taxonomy' )
-			AND ( m2.meta_key = '_menu_item_object' AND m2.meta_value = '%s' )
+			AND ( m2.meta_key = '_menu_item_object' AND m2.meta_value = %s )
 			AND ( m3.meta_key = '_menu_item_object_id' AND m3.meta_value = %d )",
 		$taxonomy,
 		$term_id
diff --git a/src/wp-includes/wp-db.php b/src/wp-includes/wp-db.php
index 9d125d008d..c601bcaba1 100644
--- a/src/wp-includes/wp-db.php
+++ b/src/wp-includes/wp-db.php
@@ -1267,7 +1267,7 @@ class wpdb {
 	 *     $wild = '%';
 	 *     $find = 'only 43% of planets';
 	 *     $like = $wild . $wpdb->esc_like( $find ) . $wild;
-	 *     $sql  = $wpdb->prepare( "SELECT * FROM $wpdb->posts WHERE post_content LIKE '%s'", $like );
+	 *     $sql  = $wpdb->prepare( "SELECT * FROM $wpdb->posts WHERE post_content LIKE %s", $like );
 	 *
 	 * Example Escape Chain:
 	 *