Update the plugin.
Marcin Probola discovered and reported this SQL Injection vulnerability in WordPress Yet Another Stars Rating Plugin. This could allow a malicious actor to directly interact with your database, including but not limited to stealing information and creating new administrator accounts. This vulnerability has been fixed in version 0.9.1.
Toggle The Debug Mode via CrossSite Request Forgery (CSRF) vulnerability
Sensitive Information Disclosure vulnerability
CrossSite Scripting (XSS) vulnerability
PHP Object Injection vulnerability