The AWeber WordPress plugin through 7.3.20 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 unfiltered_html capability is disallowed (for example in multisite setup).
Missing Authorization, Cross-Site Request Forgery (CSRF) vulnerability in AWeber AWeber – Free Sign Up Form and Landing Page Builder Plugin for Lead Generation and Email Newsletter Growth allows Accessing Functionality Not Properly Constrained by ACLs, Cross-Site Request Forgery.This issue affects AWeber – Free Sign Up Form and Landing Page Builder Plugin for Lead Generation and Email Newsletter Growth: from n/a through 7.3.9.