Multiple unrestricted file upload vulnerabilities in Kusaba 1.0.4 and earlier allow remote authenticated users to execute arbitrary code by uploading a file with an executable extension using (1) load_receiver.php or (2) a shipainter action to paint_save.php, then accessing the uploaded file via a direct request to this file in their user directory.
https://www.exploit-db.com/exploits/6711
https://www.exploit-db.com/exploits/6706
https://exchange.xforce.ibmcloud.com/vulnerabilities/45794
https://exchange.xforce.ibmcloud.com/vulnerabilities/45793
http://www.securityfocus.com/bid/31685