Reflected Cross-Site Scripting (XSS) Vulnerabilities on Scriptcase

I scanned the scriptcase app with Qualys Scan (Vulnerability scan management) and I see Level 5 security vulnerability: Reflected Cross-Site Scripting (XSS) Vulnerabilities How to fix these Vulnerabilities?

What is cross-site scripting (XSS)?, Tutorial & examples

10 Practical scenarios for XSS attacks

Grid export function affected by Reflected Cross-Site Scripting

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Cross Site Scripting

What is Cross-Site Scripting (XSS)?

What is Cross Site Scripting (XSS) ? - GeeksforGeeks

10 Practical scenarios for XSS attacks

10 Practical scenarios for XSS attacks

What is Cross-Site Scripting (XSS)? How to Prevent and Fix It

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Everything about Cross-Site Scripting (XSS)