Description
Cross-site Scripting (XSS) refers to client-side code injection attack wherein an attacker can execute malicious scripts into a legitimate website or web application. XSS occurs when a web application makes use of unvalidated or unencoded user input within the output it generates.
Remediation
Apply context-dependent encoding and/or validation to user input rendered on a page
References
Cross-site Scripting (XSS) Attack - Acunetix
XSS Filter Evasion Cheat Sheet
Excess XSS, a comprehensive tutorial on cross-site scripting
Related Vulnerabilities
WordPress Plugin EELV Newsletter Cross-Site Scripting (3.3.0)
WordPress Plugin Content Control-User Access Restriction Cross-Site Scripting (1.1.9)
WordPress Plugin Google XML Sitemaps Cross-Site Scripting (4.0.8)
WordPress Plugin PDF & Print by BestWebSoft Cross-Site Scripting (2.0.2)
WordPress Plugin YouTube Video Inserter Cross-Site Scripting (1.2.1.0)