CVE-2015-9505
The Easy Digital Downloads (EDD) core component 1.8.x before 1.8.7, 1.9.x before 1.9.10, 2.0.x before 2.0.5, 2.1.x before 2.1.11, 2.2.x before 2.2.9, and 2.3.x before 2.3.7 for WordPress has XSS because add_query_arg is misused.
Source: CVE-2015-9505