use include?

Author: firefart

modules/exploits/multi/http/mantisbt_php_exec.rb

@@ -215,7 +215,7 @@ def upload_xml(payload_b64, rand_text, cookies, is_check)
       'data'    => data_post
     }, timeout)
 
-    if res and res.body =~ /APPLICATION ERROR/
+    if res && res.body && res.body.include?('APPLICATION ERROR')
       print_error('Error on uploading XML')
       return false
     end