- Fix handling of invalid HTML comments in messages (#1487759)

CHANGELOG

@@ -1,6 +1,7 @@
 CHANGELOG Roundcube Webmail
 ===========================
 
+- Fix handling of invalid HTML comments in messages (#1487759)
 - Fix parsing FETCH response for very long headers (#1487753)
 - Fix add/remove columns in message list when message_sort_order isn't set (#1487751)
 - Check mime headers before attempt to parse them (#1487745)

program/lib/washtml.php

@@ -75,6 +75,7 @@
  * - changed $ignore_elements behaviour
  * - added RFC2397 support
  * - base URL support
+ * - invalid HTML comments removal before parsing
  */
 
 class washtml
@@ -271,6 +272,9 @@ class washtml
     else
       $this->config['base_url'] = '';
 
+    // Remove invalid HTML comments (#1487759)
+    $html = preg_replace('/<![^>]*>/', '', $html);
+
     @$node->loadHTML($html);
     return $this->dumpHtml($node);
   }