diff --git a/theme/boost/scss/moodle/drawer.scss b/theme/boost/scss/moodle/drawer.scss
index cc1606bda7b..b66185540ee 100644
--- a/theme/boost/scss/moodle/drawer.scss
+++ b/theme/boost/scss/moodle/drawer.scss
@@ -47,7 +47,8 @@ $drawer-bg: darken($body-bg, 5%) !default;
     [data-region="drawer"] {
         padding: $drawer-padding-x $drawer-padding-y;
     }
-    .jsenabled .btn-footer-popover {
+    .jsenabled .btn-footer-popover,
+    .jsenabled .btn-footer-communication {
         @include transition(0.2s);
     }
 }
diff --git a/theme/boost/scss/moodle/layout.scss b/theme/boost/scss/moodle/layout.scss
index 13435722a4c..3be9b6b4bff 100644
--- a/theme/boost/scss/moodle/layout.scss
+++ b/theme/boost/scss/moodle/layout.scss
@@ -228,7 +228,8 @@
             margin-left: 0;
             margin-right: $drawer-right-width;
             padding-right: 1rem;
-            .jsenabled & .btn-footer-popover {
+            .jsenabled & .btn-footer-popover,
+            .jsenabled & .btn-footer-communication {
                 right: calc(#{$drawer-right-width} + 2rem);
             }
         }
diff --git a/theme/boost/style/moodle.css b/theme/boost/style/moodle.css
index 9c365f31e7d..d33c354a356 100644
--- a/theme/boost/style/moodle.css
+++ b/theme/boost/style/moodle.css
@@ -29610,12 +29610,14 @@ span.editinstructions .alert-link {
   [data-region=drawer] {
     padding: 20px 20px;
   }
-  .jsenabled .btn-footer-popover {
+  .jsenabled .btn-footer-popover,
+  .jsenabled .btn-footer-communication {
     transition: 0.2s;
   }
 }
 @media (min-width: 576px) and (prefers-reduced-motion: reduce) {
-  .jsenabled .btn-footer-popover {
+  .jsenabled .btn-footer-popover,
+  .jsenabled .btn-footer-communication {
     transition: none;
   }
 }
@@ -36666,7 +36668,7 @@ span[data-flexitour=container][x-placement=right] div[data-role=arrow]:after, sp
     margin-right: 315px;
     padding-right: 1rem;
   }
-  .jsenabled #page.drawers.show-drawer-right .btn-footer-popover {
+  .jsenabled #page.drawers.show-drawer-right .btn-footer-popover, .jsenabled #page.drawers.show-drawer-right .btn-footer-communication {
     right: calc(315px + 2rem);
   }
 }
diff --git a/theme/boost/templates/footer.mustache b/theme/boost/templates/footer.mustache
index 1bd8d6af3d4..e5f15bfa9b1 100644
--- a/theme/boost/templates/footer.mustache
+++ b/theme/boost/templates/footer.mustache
@@ -38,7 +38,7 @@
 <footer id="page-footer" class="footer-popover bg-white">
     <div data-region="footer-container-popover">
         {{#output.has_communication_links}}
-            <button onclick="window.open('{{output.communication_url}}', '_blank')" class="btn btn-icon bg-primary text-white icon-no-margin btn-footer-communication" aria-label="{{#str}}communicationroomlink, course{{/str}}">
+            <button onclick="window.open('{{output.communication_url}}', '_blank', 'noreferrer')" class="btn btn-icon bg-primary text-white icon-no-margin btn-footer-communication" aria-label="{{#str}}communicationroomlink, course{{/str}}">
                 {{#pix}}t/messages-o, core{{/pix}}
             </button>
         {{/output.has_communication_links}}
diff --git a/theme/classic/style/moodle.css b/theme/classic/style/moodle.css
index 5b9ab23fdc0..6e0a7d77c58 100644
--- a/theme/classic/style/moodle.css
+++ b/theme/classic/style/moodle.css
@@ -29610,12 +29610,14 @@ span.editinstructions .alert-link {
   [data-region=drawer] {
     padding: 20px 20px;
   }
-  .jsenabled .btn-footer-popover {
+  .jsenabled .btn-footer-popover,
+  .jsenabled .btn-footer-communication {
     transition: 0.2s;
   }
 }
 @media (min-width: 576px) and (prefers-reduced-motion: reduce) {
-  .jsenabled .btn-footer-popover {
+  .jsenabled .btn-footer-popover,
+  .jsenabled .btn-footer-communication {
     transition: none;
   }
 }
@@ -36600,7 +36602,7 @@ span[data-flexitour=container][x-placement=right] div[data-role=arrow]:after, sp
     margin-right: 315px;
     padding-right: 1rem;
   }
-  .jsenabled #page.drawers.show-drawer-right .btn-footer-popover {
+  .jsenabled #page.drawers.show-drawer-right .btn-footer-popover, .jsenabled #page.drawers.show-drawer-right .btn-footer-communication {
     right: calc(315px + 2rem);
   }
 }