Ticket #22640: 22640.diff

wp-includes/js/media-editor.js

@@ -45 +45 @@
                                 sizes = attachment.sizes;
                                 size = sizes && sizes[ props.size ] ? sizes[ props.size ] : attachment;
 
-                                _.extend( props, _.pick( attachment, 'align', 'caption' ), {
+                                _.extend( props, _.pick( attachment, 'align', 'caption', 'alt' ), {
                                         width:     size.width,
                                         height:    size.height,
                                         src:       size.url,