Cross-site Scripting (XSS) - Reflected in andrewpaglusch/flashpaperValid
Sep 7th 2021
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.
The user input GET parameter
k of confirm.php is unsanitized resulting reflected cross site scripting.
Apply context-dependent encoding and/or validation to user input rendered on a page