EPSS
Percentile
33.8%
The Easy Digital Downloads (EDD) Quota theme for WordPress, as used with EDD 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, has XSS because add_query_arg is misused.
web.archive.org/web/20160921003517/https://easydigitaldownloads.com/blog/security-fix-released/