------------------------------------------------------------------------ Admin Custom Login WordPress plugin affected by persistent Cross-Site Scripting via Logo URL field ------------------------------------------------------------------------ Burak Kelebek, July 2016 ------------------------------------------------------------------------ Abstract ------------------------------------------------------------------------ A persistent Cross-Site Scripting vulnerability has been encountered in the Admin Custom Login WordPress plugin. This issue allows an attacker to perform a wide variety of actions, such as stealing Administrators' session tokens, or performing arbitrary actions on their behalf. The "logo_url" field does not validate "/> After this request is executed, re-open the admin panel of WordPress and visit the Admin Custom Login page. ------------------------------------------------------------------------ References ------------------------------------------------------------------------ [1] https://sumofpwn.nl/advisory/2016/admin_custom_login_wordpress_plugin_affected_by_persistent_cross_site_scripting_via_logo_url_field.html [2] https://wordpress.org/plugins/admin-custom-login/