Description
WordPress Plugin Drag and Drop Multiple File Upload-Contact Form 7 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 Drag and Drop Multiple File Upload-Contact Form 7 version 1.3.5.4 is vulnerable; prior versions may also be affected.
Remediation
Update to plugin version 1.3.5.5 or latest
References
https://plugins.svn.wordpress.org/drag-and-drop-multiple-file-upload-contact-form-7/trunk/readme.txt