Fix #6879, REXML::ParseException No close tag for /div

modules/exploits/multi/http/moodle_cmd_exec.rb

@@ -101,17 +101,10 @@ class MetasploitModule < Msf::Exploit::Remote
         'cookie' => sess
       })
 
-      tinymce.body.each_line do |line|
-        next if line !~ /name="sesskey"/
-        sesskey = line[0..line.index('>')]
-      end
-
-      if sesskey == ''
+      sesskey = tinymce.get_hidden_inputs[1]['sesskey']
+      unless sesskey
         fail_with(Failure::UnexpectedReply, "Unable to get proper session key")
       end
-
-      sesskey = REXML::Document.new sesskey
-      sesskey = sesskey.root.attributes["value"]
     else
       sesskey = datastore['SESSKEY']
     end