Cross-site scripting (XSS) vulnerability in the Contact Form Clean and Simple (clean-and-simple-contact-form-by-meg-nicholas) plugin 4.4.0 and earlier for WordPress allows remote attackers to inject arbitrary web script or HTML via the cscf[name] parameter to contact-us/.
The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.