Description
WordPress Plugin Mail Masta is prone to a local file inclusion vulnerability because it fails to sufficiently verify user-supplied input. Exploiting this issue may allow an attacker to obtain sensitive information that could aid in further attacks. WordPress Plugin Mail Masta version 1.0 is vulnerable.
Remediation
Edit the source code to ensure that input is properly verified or disable the plugin until a fix is available
References
https://www.exploit-db.com/exploits/40290/
https://packetstormsecurity.com/files/138481/WordPress-Mail-Master-1.0-Local-File-Inclusion.html