diff --git a/wp-includes/admin-bar.php b/wp-includes/admin-bar.php
index a05e0a1cfe..05067db7d1 100644
--- a/wp-includes/admin-bar.php
+++ b/wp-includes/admin-bar.php
@@ -114,11 +114,13 @@ function wp_admin_bar_my_sites_menu() {
 		//$blavatar = '<img src="' . esc_url( blavatar_url( blavatar_domain( $blog->siteurl ), 'img', 16, $default ) ) . '" alt="Blavatar" width="16" height="16" />';
 		$blavatar = '<img src="' . esc_url($default) . '" alt="' . esc_attr__( 'Blavatar' ) . '" width="16" height="16" class="blavatar"/>';
 
-		$blogname = empty( $blog->blogname ) ? $blog->domain : $blog->blogname;
+		$full_blogname = $blogname = empty( $blog->blogname ) ? $blog->domain : $blog->blogname;
 		if ( strlen( $blogname ) > 15 )
 			$blogname = substr( $blogname, 0, 15 ) . '&hellip;';
+		else
+			$full_blogname = '';
 
-		$wp_admin_bar->add_menu( array( 'parent' => 'my-blogs', 'id' => 'blog-' . $blog->userblog_id, 'title' => $blavatar . $blogname,  'href' => get_admin_url($blog->userblog_id), ) );
+		$wp_admin_bar->add_menu( array( 'parent' => 'my-blogs', 'id' => 'blog-' . $blog->userblog_id, 'title' => $blavatar . $blogname,  'href' => get_admin_url($blog->userblog_id), 'meta' => array( 'title' => $full_blogname ) ) );
 		$wp_admin_bar->add_menu( array( 'parent' => 'blog-' . $blog->userblog_id, 'id' => 'blog-' . $blog->userblog_id . '-d', 'title' => __( 'Dashboard' ), 'href' => get_admin_url($blog->userblog_id) ) );
 
 		if ( current_user_can_for_blog( $blog->userblog_id, 'edit_posts' ) ) {
diff --git a/wp-includes/class-wp-admin-bar.php b/wp-includes/class-wp-admin-bar.php
index 9053a82c31..c0a371bc0d 100644
--- a/wp-includes/class-wp-admin-bar.php
+++ b/wp-includes/class-wp-admin-bar.php
@@ -53,7 +53,7 @@ class WP_Admin_Bar {
 			'href' => false,
 			'parent' => false, // false for a root menu, pass the ID value for a submenu of that menu.
 			'id' => false, // defaults to a sanitized title value.
-			'meta' => false // array of any of the following options: array( 'html' => '', 'class' => '', 'onclick' => '', target => '' );
+			'meta' => false // array of any of the following options: array( 'html' => '', 'class' => '', 'onclick' => '', target => '', title => '' );
 		);
 
 		$r = wp_parse_args( $args, $defaults );
@@ -117,15 +117,18 @@ class WP_Admin_Bar {
 
 		<li class="<?php echo $menuclass . "ab-$id" ?><?php
 			if ( ! empty( $menu_item['meta']['class'] ) ) :
-				echo ' ' . $menu_item['meta']['class'];
+				echo ' ' . esc_attr( $menu_item['meta']['class'] );
 			endif;
 		?>">
-			<a href="<?php echo strip_tags( $menu_item['href'] ) ?>"<?php
+			<a href="<?php echo esc_url( $menu_item['href'] ) ?>"<?php
 				if ( ! empty( $menu_item['meta']['onclick'] ) ) :
-					?> onclick="<?php echo $menu_item['meta']['onclick']; ?>"<?php
+					?> onclick="<?php echo esc_js( $menu_item['meta']['onclick'] ); ?>"<?php
 				endif;
 			if ( ! empty( $menu_item['meta']['target'] ) ) :
-				?> target="<?php echo $menu_item['meta']['target']; ?>"<?php
+				?> target="<?php echo esc_attr( $menu_item['meta']['target'] ); ?>"<?php
+			endif;
+			if ( ! empty( $menu_item['meta']['title'] ) ) :
+				?> title="<?php echo esc_attr( $menu_item['meta']['title'] ); ?>"<?php
 			endif;
 
 			?>><?php