Security Vulnerabilities was found utilizing DefenseCode by Neven Biruski in application source code security testing phase. XSS is a very commonly exploited vulnerability type which is very widely spread and easily detectable. An attacker can inject untrusted snippets of JavaScript into your application without validation. This JavaScript is then executed by the victim who is visiting the target site. The bug has been reported to Vendor by Defense code and they released a fix on 2017/05/17. So the solution is simple, you need to update to the latest available version of AffiliateWP plugin.”]
Source: https://gbhackers.com/wordpress-affiliatewp-plugin-vulnerable-cross-site-scripting/