--- a/wp/wp-admin/upgrade.php	Thu Sep 29 08:06:27 2022 +0200
+++ b/wp/wp-admin/upgrade.php	Fri Sep 05 18:40:08 2025 +0200
@@ -39,12 +39,13 @@
  * @global string $wp_version             The WordPress version string.
  * @global string $required_php_version   The required PHP version string.
  * @global string $required_mysql_version The required MySQL version string.
+ * @global wpdb   $wpdb                   WordPress database abstraction object.
  */
-global $wp_version, $required_php_version, $required_mysql_version;
+global $wp_version, $required_php_version, $required_mysql_version, $wpdb;
 
 $step = (int) $step;
 
-$php_version   = phpversion();
+$php_version   = PHP_VERSION;
 $mysql_version = $wpdb->db_version();
 $php_compat    = version_compare( $php_version, $required_php_version, '>=' );
 if ( file_exists( WP_CONTENT_DIR . '/db.php' ) && empty( $wpdb->is_mysql ) ) {
@@ -71,13 +72,13 @@
 
 <h1><?php _e( 'No Update Required' ); ?></h1>
 <p><?php _e( 'Your WordPress database is already up to date!' ); ?></p>
-<p class="step"><a class="button button-large" href="<?php echo get_option( 'home' ); ?>/"><?php _e( 'Continue' ); ?></a></p>
+<p class="step"><a class="button button-large" href="<?php echo esc_url( get_option( 'home' ) ); ?>/"><?php _e( 'Continue' ); ?></a></p>
 
 	<?php
 elseif ( ! $php_compat || ! $mysql_compat ) :
 	$version_url = sprintf(
 		/* translators: %s: WordPress version. */
-		esc_url( __( 'https://wordpress.org/support/wordpress-version/version-%s/' ) ),
+		esc_url( __( 'https://wordpress.org/documentation/wordpress-version/version-%s/' ) ),
 		sanitize_title( $wp_version )
 	);
 
@@ -132,7 +133,7 @@
 		case 0:
 			$goback = wp_get_referer();
 			if ( $goback ) {
-				$goback = esc_url_raw( $goback );
+				$goback = sanitize_url( $goback );
 				$goback = urlencode( $goback );
 			}
 			?>