--- a/bug_report.php	2019-05-06 12:06:44.265508011 +0200
+++ b/bug_report.php	2019-05-06 12:09:40.106952738 +0200
@@ -67,6 +67,17 @@
 	'copy_files' => $f_copy_attachments_from_parent
 );
 
+# begin captcha check for anon user
+if ( current_user_is_anonymous() && get_gd_version() > 0 ) {
+  $f_captcha = gpc_get_string( 'captcha', '' );
+  $f_captcha = utf8_strtolower( trim( $f_captcha ) );
+
+  $t_securimage = new Securimage();
+  if( $t_securimage->check( $f_captcha ) == false ) {
+    trigger_error( ERROR_SIGNUP_NOT_MATCHING_CAPTCHA, ERROR );
+  }
+}
+
 if( $f_master_bug_id > 0 ) {
 	bug_ensure_exists( $f_master_bug_id );