diff --git a/addons/website/models/website_visitor.py b/addons/website/models/website_visitor.py
index 2be9bec6283..ffb1d58c621 100644
--- a/addons/website/models/website_visitor.py
+++ b/addons/website/models/website_visitor.py
@@ -62,8 +62,8 @@ class WebsiteVisitor(models.Model):
     country_flag = fields.Char(related="country_id.image_url", string="Country Flag")
     lang_id = fields.Many2one('res.lang', string='Language', help="Language from the website when visitor has been created")
     timezone = fields.Selection(_tz_get, string='Timezone')
-    email = fields.Char(string='Email', compute='_compute_email_phone')
-    mobile = fields.Char(string='Mobile', compute='_compute_email_phone')
+    email = fields.Char(string='Email', compute='_compute_email_phone', compute_sudo=True)
+    mobile = fields.Char(string='Mobile', compute='_compute_email_phone', compute_sudo=True)
 
     # Visit fields
     visit_count = fields.Integer('# Visits', default=1, readonly=True, help="A new visit is considered if last connection was more than 8 hours ago.")
diff --git a/addons/website_crm/models/website_visitor.py b/addons/website_crm/models/website_visitor.py
index 18bf191c882..c990a7ab1ff 100644
--- a/addons/website_crm/models/website_visitor.py
+++ b/addons/website_crm/models/website_visitor.py
@@ -21,7 +21,7 @@ class WebsiteVisitor(models.Model):
         super(WebsiteVisitor, self)._compute_email_phone()
 
         left_visitors = self.filtered(lambda visitor: not visitor.email or not visitor.mobile)
-        leads = left_visitors.sudo().mapped('lead_ids').sorted('create_date', reverse=True)
+        leads = left_visitors.mapped('lead_ids').sorted('create_date', reverse=True)
         visitor_to_lead_ids = dict((visitor.id, visitor.lead_ids.ids) for visitor in left_visitors)
 
         for visitor in left_visitors:
diff --git a/addons/website_event/views/website_visitor_views.xml b/addons/website_event/views/website_visitor_views.xml
index f1cf0ccaa85..7cfd3eb563f 100644
--- a/addons/website_event/views/website_visitor_views.xml
+++ b/addons/website_event/views/website_visitor_views.xml
@@ -21,6 +21,7 @@
                 <button name="%(website_event.event_registration_action_from_visitor)d"
                     type="action"
                     class="oe_stat_button" icon="fa-ticket"
+                    groups="event.group_event_user"
                     invisible="event_registration_count == 0">
                     <field name="event_registration_count" widget="statinfo" string="Registrations"/>
                 </button>
diff --git a/addons/website_event_track/views/website_visitor_views.xml b/addons/website_event_track/views/website_visitor_views.xml
index 458e5c2c3d3..1ee2463bc58 100644
--- a/addons/website_event_track/views/website_visitor_views.xml
+++ b/addons/website_event_track/views/website_visitor_views.xml
@@ -21,6 +21,7 @@
                 <button name="%(website_event_track.event_track_action_from_visitor)d"
                     type="action"
                     class="oe_stat_button" icon="fa-ticket"
+                    groups="event.group_event_manager"
                     invisible="event_track_wishlisted_count == 0">
                     <field name="event_track_wishlisted_count" widget="statinfo" string="Tracks"/>
                 </button>