The Inpersttion For Theme plugin for WordPress is vulnerable to Remote Code Execution in all versions up to, and including, 1.0 via the theme_section_shortcode() function. This is due to the plugin not restricting what functions can be called. This makes it possible for authenticated attackers, with Contributor-level access and above, to execute code on the server which is limited to arbitrary functions without any user supplied parameters.
The product constructs all or part of a code segment using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the syntax or behavior of the intended code segment.