Description
WordPress Plugin Zip Attachments is prone to a vulnerability that lets attackers download arbitrary files because the application fails to sufficiently verify user-supplied input. This may allow an attacker to gain access to sensitive information, which may aid in launching further attacks. WordPress Plugin Zip Attachments version 1.4 is vulnerable; prior versions may also be affected.
Remediation
Update to plugin version 1.5 or latest
References
http://www.vapidlabs.com/advisory.php?v=126
http://www.openwall.com/lists/oss-security/2015/06/12/4
http://seclists.org/oss-sec/2015/q2/698
https://wordpress.org/support/topic/zip-attachments-wordpress-plugin-v114-arbitrary-file-download-