Key Information Vulnerability Overview Vulnerability Type: Stored Cross-Site Scripting (XSS) Affected System: CodeAstro Simple Hospital Management System in Python Affected File: Attack Vector: Injection of malicious JavaScript via the parameter in a POST request Affected Version: v1.0 Proof of Concept (PoC) 1. Navigate to Patient Section - Access the patient registration page: 2. Inject XSS Payload in Name Field - Paste the following payload into the "First Name" input field and click "Save Info": 3. Trigger the Payload - Refresh the profile page; the JavaScript will execute, confirming the stored XSS vulnerability. Potential Impact Session Hijacking: Steal user sessions to access sensitive data. Phishing Attacks: Deceive users into visiting malicious websites. Content Tampering: Alter webpage content, damaging brand reputation. Data Leakage: Exfiltrate sensitive data via backend requests. Malware Distribution: Redirect users to malicious domains. Privilege Escalation: Exploit stored scripts to access higher-privileged accounts. Mitigation Strategies Input Validation: Validate all user inputs using regular expressions and filters. Output Encoding: Encode dynamic content before rendering. Content Security Policy (CSP): Implement strong CSP headers to prevent inline script execution. Use Modern Frameworks: Adopt frameworks with built-in XSS protection such as Laravel, Symfony, or CodeIgniter. Security Testing: Conduct regular penetration testing using tools like OWASP ZAP and Burp Suite.