Stored XSS in VikBooking Hotel Booking Engine & PMS

Executive Summary

This is a Stored Cross-Site Scripting (XSS) vulnerability in the VikBooking Hotel Booking Engine & PMS plugin. It allows attackers to inject malicious scripts into web pages viewed by other users. The flaw occurs due to improper neutralization of user input during web page generation.

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Detection Guidance

To detect this Stored XSS vulnerability in VikBooking, inspect web application inputs for unsanitized user-provided data stored in the system. Check form submissions, booking details, and admin interfaces for JavaScript payloads like <script>alert(1)</script>. Use browser developer tools to monitor network requests for suspicious data flows.

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Impact Analysis

An attacker could exploit this to steal user session cookies, redirect users to malicious sites, or perform actions on behalf of users. It may lead to unauthorized access to sensitive data, account takeovers, or defacement of the website.

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Compliance Impact

This vulnerability could violate GDPR by exposing user data through XSS attacks. For HIPAA, it may compromise protected health information if exploited in healthcare-related booking systems. Non-compliance risks include fines and reputational damage.

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Mitigation Strategies

Update VikBooking to the latest version (1.8.20 or later) to patch the flaw. If immediate update isn't possible, implement input validation and output encoding for all user-supplied data. Disable unnecessary user roles with posting privileges and monitor for unusual activity in booking logs.

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