Cross-Site Scripting in Hotel and Tourism Reservation PHP

Executive Summary

CVE-2026-86216 is a Reflected Cross-Site Scripting (XSS) vulnerability in the Hotel and Tourism Reservation System affecting the room parameter in the /ht/details.php endpoint. The flaw occurs because the application reflects user input from the room GET parameter into the HTML response without proper encoding.

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Detection Guidance

To detect this reflected XSS vulnerability, inspect HTTP requests to /ht/details.php for the 'room' parameter containing suspicious payloads like <script> tags or event handlers. Use browser developer tools to check if user input is reflected in the HTML response without encoding. Tools like Burp Suite or OWASP ZAP can intercept and analyze requests for malicious payloads in the 'room' parameter.

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Impact Analysis

An attacker can craft a malicious URL with a JavaScript payload in the room parameter. When a victim visits this URL, the script executes in their browser, potentially enabling unauthorized actions, content manipulation, or session hijacking.

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Compliance Impact

This reflected XSS vulnerability could lead to unauthorized access to sensitive user data, such as personal or health information, which may violate GDPR and HIPAA compliance requirements. Exploitation could enable session hijacking or data theft, posing risks to data confidentiality and integrity.

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Mitigation Strategies

Immediately apply strict input validation to the 'room' parameter, ensuring it only accepts numeric values. Implement contextual output encoding for all user-controlled data before rendering in HTML. Update the application to use parameterized queries to prevent injection. Deploy a restrictive Content Security Policy to limit script execution. Monitor logs for attempts to exploit this flaw.

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