Key Information Vulnerability Type Stored XSS Vulnerable File Vulnerability Description A stored XSS vulnerability exists in . Code Analysis 1. Malicious Data Injection: Attackers can inject malicious JavaScript code by submitting parameters (such as ) containing harmful payloads. The server stores this input directly into the table in the database without sufficient filtering. 2. Malicious Code Execution: When any user (e.g., an administrator) accesses the page to view the list of vehicles, the vulnerability is triggered. The page retrieves the previously stored malicious value from the database and renders it directly into the HTML page using an statement, without any HTML encoding or security filtering. POC (Proof of Concept) 1. Injection Payload: The attacker sends the following POST request to inject an XSS payload into the field: 2. Triggering the Vulnerability: When an administrator accesses the page, the XSS script will be executed. Recommended Fixes HTML Entity Encoding on Output: Before rendering any data from the database or user input into an HTML page, it must be processed using functions such as . Input Validation: In addition to output encoding, implement input validation as a second line of defense before storing data. Implement Content Security Policy (CSP): Configure a strict CSP in the server response headers to restrict browsers from loading and executing scripts from untrusted sources, thereby preventing malicious scripts from running.