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 User Role by BestWebSoft Cross-Site Scripting (1.4.1)
WordPress Plugin WP e-Commerce Predictive Search Cross-Site Scripting (1.1.1)
WordPress Plugin Simple Download Monitor Cross-Site Scripting (3.9.10)
WordPress Plugin Sign-up Sheets Cross-Site Scripting (1.0.13)
WordPress Plugin WP Visitor Statistics (Real Time Traffic) Cross-Site Scripting (6.4)