Cross-Site Scripting (XSS) Vulnerability

High Severity Technical Guide

Vulnerability Description

Cross-Site Scripting (XSS) occurs when an application includes untrusted data in a web page without proper validation or escaping, allowing attackers to execute malicious scripts in the victim's browser. This can lead to session hijacking, defacement, or redirecting users to malicious sites.

Remediation Guide

To resolve this vulnerability, follow these config changes or developer practices:

Enforce robust contextual output encoding for all user inputs before displaying them in HTML. Implement a strict Content-Security-Policy (CSP) that blocks inline scripts and limits script sources to trusted domains.

Verify Your Fix

After applying the remediation, run an external attack-surface scan to verify that the vulnerability is no longer detected by WebScanify.

Is your website vulnerable?

Run a free security scan now to identify missing headers, outdated JS, and other deployment vulnerabilities.