Vulnerability in wordpress plugin rk-responsive-contact-form v1.0, The variable $delid isn't sanitized before being passed into an SQL query in file ./rk-responsive-contact-form/include/rkuserlist.php.
The Responsive Contact Form Builder & Lead Generation Plugin WordPress plugin through 1.8.9 does not sanitise and escape some of its settings, which could allow high privilege users such as admin to perform Stored Cross-Site Scripting attacks even when the unfilteredhtml capability is disallowed (for example in multisite setup)