diff --git a/src/wp-admin/css/common.css b/src/wp-admin/css/common.css
index 3ea8a878bcf68..f039c48dddde7 100644
--- a/src/wp-admin/css/common.css
+++ b/src/wp-admin/css/common.css
@@ -2969,6 +2969,11 @@ div.action-links {
 	line-height: 1.7;
 }
 
+#plugin-information #section-description iframe {
+	width: 100%;
+	height: auto;
+}
+
 #plugin-information #section-screenshots ol {
 	list-style: none;
 	margin: 0;
diff --git a/src/wp-admin/includes/plugin-install.php b/src/wp-admin/includes/plugin-install.php
index 7e5a04c0a0aa5..0d8f6db77632e 100644
--- a/src/wp-admin/includes/plugin-install.php
+++ b/src/wp-admin/includes/plugin-install.php
@@ -567,6 +567,13 @@ function install_plugin_information() {
 			'alt'   => array(),
 		),
 		'blockquote' => array( 'cite' => true ),
+		'iframe'     => array(
+			'src'             => array(),
+			'width'           => array(),
+			'height'          => array(),
+			'frameborder'     => array(),
+			'allowfullscreen' => array(),
+		),
 	);
 
 	$plugins_section_titles = array(