The WS Facebook Like Box Widget for WordPress plugin for WordPress is vulnerable to Stored Cross-Site Scripting via 'ws-facebook-likebox' shortcode in versions up to, and including, 5.0 due to insufficient input sanitization and output escaping on user supplied attributes. This makes it possible for authenticated attackers with contributor-level and above permissions to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.

Multiple cross-site request forgery (CSRF) vulnerabilities in the Facebook Like Box (cardoza-facebook-like-box) plugin before 2.8.3 for WordPress allow remote attackers to hijack the authentication of administrators for requests that (1) change plugin settings via unspecified vectors or conduct cross-site scripting (XSS) attacks via the (2) frm_title, (3) frm_url, (4) frm_border_color, (5) frm_width, or (6) frm_height parameter in the slug_for_fb_like_box page to wp-admin/admin.php.