Yesterday we observed a strange short return of the SweetCaptcha plugin to WordPress.org repository.
In June we reported that SweetCaptcha injected third-party ad code to their scripts which lead to malvertising problems on the sites that used this CAPTCHA service. After that incident, the SweetCaptcha WordPress plugin had been removed from the official plugin repository.
To our surprise, we noticed SweetCaptcha in the WordPress repository on July 22 2015. To even greater surprise, the plugin page URL was https://wordpress.org/plugins/jumpple/.