Description
WordPress Plugin MailCWP 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 MailCWP version 1.99 is vulnerable; prior versions may also be affected.
Remediation
Update to plugin version 1.100 or latest
References
http://www.vapidlabs.com/advisory.php?v=138
http://www.openwall.com/lists/oss-security/2015/07/17/1
http://seclists.org/oss-sec/2015/q3/129
https://packetstormsecurity.com/files/132739/WordPress-Mailcwp-1.99-Shell-Upload.html