Ticket #50812: 50812.patch

wp-includes/rest-api/endpoints/class-wp-rest-users-controller.php

@@ -1291 +1291 @@
                 if ( false !== strpos( $password, '\\' ) ) {
                         return new WP_Error(
                                 'rest_user_invalid_password',
-                                __( 'Passwords cannot contain the "\\" character.' ),
+                                sprintf(
+                                        /* translators: %s: The '\' character. */
+                                        __( 'Passwords cannot contain the "%s" character.' ),
+                                        '\\'
+                                ),
                                 array( 'status' => 400 )
                         );
                 }