Fix stale plugin updates after bulk update

src/wp-admin/includes/class-bulk-plugin-upgrader-skin.php

@@ -78,11 +78,10 @@ public function bulk_footer() {
 			),
 			'updates_page' => sprintf(
 				'<a href="%s" target="_parent">%s</a>',
-				self_admin_url( 'update-core.php' ),
+				self_admin_url( 'update-core.php?force-check=1' ),
 				__( 'Go to WordPress Updates page' )
 			),
 		);
-
 		if ( ! current_user_can( 'activate_plugins' ) ) {
 			unset( $update_actions['plugins_page'] );
 		}

src/wp-admin/update-core.php

@@ -1061,6 +1061,18 @@ function do_undismiss_core_update() {
 	$force_check = ! empty( $_GET['force-check'] );
 	wp_version_check( array(), $force_check );
 
+	if ( $force_check ) {
+		if ( current_user_can( 'update_plugins' ) ) {
+			delete_site_transient( 'update_plugins' );
+			wp_update_plugins();
+		}
+
+		if ( current_user_can( 'update_themes' ) ) {
+			delete_site_transient( 'update_themes' );
+			wp_update_themes();
+		}
+	}
+
 	require_once ABSPATH . 'wp-admin/admin-header.php';
 	?>
 	<div class="wrap">

tests/phpunit/tests/admin/wpUpgrader.php

@@ -84,11 +84,33 @@ public function tear_down() {
 	 * @covers WP_Upgrader::__construct
 	 */
 	public function test_constructor_should_create_skin_when_one_is_not_provided() {
+
 		$instance = new WP_Upgrader();
 
 		$this->assertInstanceOf( WP_Upgrader_Skin::class, $instance->skin );
 	}
 
+	/**
+	 * Tests that the bulk plugin updater footer links back to a fresh Updates screen check.
+	 *
+	 * @ticket 48364
+	 *
+	 * @covers Bulk_Plugin_Upgrader_Skin::bulk_footer
+	 */
+	public function test_bulk_plugin_upgrader_skin_updates_page_link_should_force_check() {
+
+		$skin     = new Bulk_Plugin_Upgrader_Skin();
+		$upgrader = new WP_Upgrader( $skin );
+
+		$upgrader->init();
+
+		ob_start();
+		$skin->bulk_footer();
+		$output = ob_get_clean();
+
+		$this->assertStringContainsString( 'update-core.php?force-check=1', $output );
+	}
+
 	/**
 	 * Tests that `WP_Upgrader::init()` calls `WP_Upgrader::set_upgrader()`.
 	 *