Description
WordPress Plugin Webapp builder (Free mobile apps native iPhone iOS & Android Winphone mobile apps) is prone to a vulnerability that lets attackers upload arbitrary files because the application fails to properly verify user-supplied input. An attacker can exploit this vulnerability to upload arbitrary code and run it in the context of the webserver process. This may facilitate unauthorized access or privilege escalation; other attacks are also possible. WordPress Plugin Webapp builder (Free mobile apps native iPhone iOS & Android Winphone mobile apps) version 2.0 is vulnerable; prior versions may also be affected.
Remediation
Edit the source code to ensure that input is properly verified or disable the plugin until a fix is available
References
http://www.vapidlabs.com/advisory.php?v=181
https://www.exploit-db.com/exploits/41540/
https://packetstormsecurity.com/files/141676/WordPress-Multiple-Plugin-File-Upload.html