Pricing Table by Supsystic <= 1.9.12 is vulnerable to Content Injection vulnerability

The Pricing Table by Supsystic plugin for WordPress is vulnerable to content injection in all versions up to, and including, 1.9.12. This makes it possible for authenticated attackers, with admin-level access and above, to inject arbitrary content. This is not a security issue by default, however, administrators can grant lower-level users access to functionality that makes this a security issue.