diff --git src/wp-admin/includes/misc.php src/wp-admin/includes/misc.php
index a8600f1d24..a7b5fbfa1d 100644
--- src/wp-admin/includes/misc.php
+++ src/wp-admin/includes/misc.php
@@ -1132,12 +1132,8 @@ function wp_admin_canonical_url() {
 	$filtered_url = remove_query_arg( $removable_query_args, $current_url );
 	?>
 	<link id="wp-admin-canonical" rel="canonical" href="<?php echo esc_url( $filtered_url ); ?>" />
-	<script>
-		if ( window.history.replaceState ) {
-			window.history.replaceState( null, null, document.getElementById( 'wp-admin-canonical' ).href + window.location.hash );
-		}
-	</script>
-<?php
+	<?php
+	wp_remove_feedback_query_args( 'wp-admin-canonical' );
 }
 
 /**
diff --git src/wp-comments-post.php src/wp-comments-post.php
index c61e73dcd1..b4a7990de5 100644
--- src/wp-comments-post.php
+++ src/wp-comments-post.php
@@ -54,6 +54,10 @@ do_action( 'set_comment_cookies', $comment, $user, $cookies_consent );
 
 $location = empty( $_POST['redirect_to'] ) ? get_comment_link( $comment ) : $_POST['redirect_to'] . '#comment-' . $comment->comment_ID;
 
+if ( ! $cookies_consent && 'unapproved' === wp_get_comment_status( $comment ) ) {
+	$location = add_query_arg( 'unapproved', $comment->comment_ID, $location );
+}
+
 /**
  * Filters the location URI to send the commenter after posting.
  *
diff --git src/wp-includes/comment-template.php src/wp-includes/comment-template.php
index 5c3f0b7844..6c9873dd57 100644
--- src/wp-includes/comment-template.php
+++ src/wp-includes/comment-template.php
@@ -1692,7 +1692,7 @@ function get_comment_reply_link( $args = array(), $comment = null, $post = null
 
 		$link = sprintf(
 			"<a rel='nofollow' class='comment-reply-link' href='%s' %s aria-label='%s'>%s</a>",
-			esc_url( add_query_arg( 'replytocom', $comment->comment_ID ) ) . "#" . $args['respond_id'],
+			esc_url( add_query_arg( array( 'replytocom' => $comment->comment_ID, 'unapproved' => false ) ) ) . "#" . $args['respond_id'],
 			$data_attribute_string,
 			esc_attr( sprintf( $args['reply_to_text'], $comment->comment_author ) ),
 			$args['reply_text']
@@ -2260,7 +2260,12 @@ function comment_form( $args = array(), $post_id = null ) {
 	$req      = get_option( 'require_name_email' );
 	$html_req = ( $req ? " required='required'" : '' );
 	$html5    = 'html5' === $args['format'];
-	$consent  = empty( $commenter['comment_author_email'] ) ? '' : ' checked="checked"';
+	$consent  = ' checked="checked"';
+	if ( empty( $commenter['cookies_consent'] ) ) {
+		$consent = '';
+		$commenter = array_fill_keys( array_keys( $commenter ), '' );
+	}
+
 	$fields   = array(
 		'author'  => '<p class="comment-form-author">' . '<label for="author">' . __( 'Name' ) . ( $req ? ' <span class="required">*</span>' : '' ) . '</label> ' .
 					 '<input id="author" name="author" type="text" value="' . esc_attr( $commenter['comment_author'] ) . '" size="30" maxlength="245"' . $html_req . ' /></p>',
diff --git src/wp-includes/comment.php src/wp-includes/comment.php
index 4c78eb9b6a..bf3eda17d9 100644
--- src/wp-includes/comment.php
+++ src/wp-includes/comment.php
@@ -1742,8 +1742,11 @@ function _clear_modified_cache_on_transition_comment_status( $new_status, $old_s
  * @see sanitize_comment_cookies() Use to sanitize cookies
  *
  * @since 2.0.4
+ * @since 4.9.6 Tries to get a query parameter containing the comment ID to
+ *              set the comment author data when the user has not consented
+ *              to cookies.
  *
- * @return array Comment author, email, url respectively.
+ * @return array Comment author, email, url, cookies consent respectively.
  */
 function wp_get_current_commenter() {
 	// Cookies should already be sanitized.
@@ -1763,20 +1766,39 @@ function wp_get_current_commenter() {
 		$comment_author_url = $_COOKIE[ 'comment_author_url_' . COOKIEHASH ];
 	}
 
+	$comment_author_data = compact( 'comment_author', 'comment_author_email', 'comment_author_url' );
+
+	if ( ! array_filter( $comment_author_data ) ) {
+		// Set the current commenter using the just posted comment ID.
+		if ( is_singular() && isset( $_GET['unapproved'] ) ) {
+			$comment = get_comment( $_GET['unapproved'], ARRAY_A );
+
+			if ( isset( $comment['comment_author_email'] ) ) {
+				$comment_author_data = array_intersect_key( $comment, $comment_author_data );
+			}
+		}
+
+		$comment_author_data['cookies_consent'] = false;
+	} else {
+		$comment_author_data['cookies_consent'] = true;
+	}
+
 	/**
 	 * Filters the current commenter's name, email, and URL.
 	 *
 	 * @since 3.1.0
+	 * @since 4.9.6 Adds the $cookies_consent parameter.
 	 *
 	 * @param array $comment_author_data {
 	 *     An array of current commenter variables.
 	 *
-	 *     @type string $comment_author       The name of the author of the comment. Default empty.
-	 *     @type string $comment_author_email The email address of the `$comment_author`. Default empty.
-	 *     @type string $comment_author_url   The URL address of the `$comment_author`. Default empty.
+	 *     @type string  $comment_author       The name of the author of the comment. Default empty.
+	 *     @type string  $comment_author_email The email address of the `$comment_author`. Default empty.
+	 *     @type string  $comment_author_url   The URL address of the `$comment_author`. Default empty.
+	 *     @type boolean $cookies_consent      Whether the user consented to cookies or not. Default false.
 	 * }
 	 */
-	return apply_filters( 'wp_get_current_commenter', compact( 'comment_author', 'comment_author_email', 'comment_author_url' ) );
+	return apply_filters( 'wp_get_current_commenter', $comment_author_data );
 }
 
 /**
diff --git src/wp-includes/functions.php src/wp-includes/functions.php
index 763b98df28..612fa9d232 100644
--- src/wp-includes/functions.php
+++ src/wp-includes/functions.php
@@ -931,6 +931,48 @@ function wp_removable_query_args() {
 	return apply_filters( 'removable_query_args', $removable_query_args );
 }
 
+/**
+ * Removes query variables used to provide user feedbacks from the current URL.
+ *
+ * @since 4.9.6
+ *
+ * @param string $canonical_id The canonical URL link tag's id attribute.
+ */
+function wp_remove_feedback_query_args( $canonical_id = 'wp-canonical' ) {
+	$query_args = array();
+
+	if ( ! is_admin() ) {
+		$query_args = wp_parse_url( $_SERVER['REQUEST_URI'], PHP_URL_QUERY );
+
+		if ( ! $query_args ) {
+			return;
+		} else {
+			$query_args = wp_parse_args( $query_args, array() );
+
+			if ( ! isset( $query_args['unapproved'] ) ) {
+				return;
+			}
+
+			// Remove the reserved query var key without altering the others.
+			unset( $query_args['unapproved'] );
+		}
+	}
+	printf( '
+<script>
+	var canonicalUrl = document.getElementById( \'%1$s\' ).href.split( \'#\' )[0],
+	    qv = %2$s;
+
+	if ( \'object\' === typeof qv && qv.length ) {
+		canonicalUrl += \'?\' + Object.keys( qv ).map( k => k + \'=\' + qv[k] ).join( \'&\' );
+	}
+
+	if ( window.history.replaceState ) {
+		window.history.replaceState( null, null, canonicalUrl + window.location.hash );
+	}
+</script>
+	', $canonical_id, json_encode( $query_args ) );
+}
+
 /**
  * Walks the array while sanitizing the contents.
  *
diff --git src/wp-includes/link-template.php src/wp-includes/link-template.php
index 815c539a4a..5c6489a328 100644
--- src/wp-includes/link-template.php
+++ src/wp-includes/link-template.php
@@ -3730,7 +3730,8 @@ function rel_canonical() {
 	$url = wp_get_canonical_url( $id );
 
 	if ( ! empty( $url ) ) {
-		echo '<link rel="canonical" href="' . esc_url( $url ) . '" />' . "\n";
+		echo '<link id="wp-canonical" rel="canonical" href="' . esc_url( $url ) . '" />' . "\n";
+		wp_remove_feedback_query_args();
 	}
 }