The Social Sharing Toolkit WordPress plugin through 2.6 does not validate and escape some of its shortcode attributes before outputting them back in the page, which could allow users with a role as low as contributor to perform Stored Cross-Site Scripting attacks which could be used against high privilege users such as admins.

Cross-site request forgery (CSRF) vulnerability in the Social Sharing Toolkit plugin 2.1.1 for WordPress allows remote attackers to hijack the authentication of administrators for requests that manipulate plugin settings via unknown vectors.

Cross-site scripting (XSS) vulnerability in Social Sharing Toolkit plugin before 2.1.2 for WordPress allows remote attackers to inject arbitrary web script or HTML via unspecified vectors.