Description
WordPress Plugin Mail Masta is prone to multiple SQL injection vulnerabilities because it fails to sufficiently sanitize user-supplied data before using it in an SQL query. Exploiting these issues could allow an attacker to compromise the application, access or modify data, or exploit latent vulnerabilities in the underlying database. WordPress Plugin Mail Masta version 1.0 is vulnerable.
Remediation
Edit the source code to ensure that input is properly sanitised or disable the plugin until a fix is available
References
https://github.com/hamkovic/Mail-Masta-Wordpress-Plugin-SQL-Injection-Vulnerability
https://www.exploit-db.com/exploits/41438/
https://packetstormsecurity.com/files/141277/WordPress-Mail-Masta-1.0-SQL-Injection.html