Executive Summary

CVE-2023-53738 is a reflected cross-site scripting (XSS) vulnerability in Kentico Xperience versions up to 13.0.109. It allows authenticated users to inject malicious scripts via page preview URLs. When other users interact with these page previews, the injected scripts can execute in their browsers, potentially leading to harmful actions such as session hijacking or defacement. [1]

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Impact Analysis

This vulnerability can impact you by allowing attackers to execute arbitrary scripts in the browsers of users interacting with the page preview feature. This can lead to session hijacking, defacement, or other malicious activities that compromise user data and trust. [1]

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Detection Guidance

This vulnerability can be detected by monitoring and analyzing page preview URLs in Kentico Xperience for reflected script injection patterns. Since it involves reflected cross-site scripting via page preview URLs, you can look for unusual or suspicious script tags or JavaScript code embedded in URL parameters related to page previews. Specific commands are not provided in the resources, but typical detection methods include using web application scanners that test for reflected XSS or manually inspecting HTTP requests to page preview endpoints for injected scripts. [1]

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Mitigation Strategies

Immediate mitigation steps include applying the hotfixes provided by Kentico to address the vulnerability. Additionally, restricting or monitoring authenticated user access to the page preview feature can reduce risk. Implementing input validation and output encoding on page preview URLs can also help prevent script injection. Since the vulnerability requires authenticated user interaction, limiting privileges and educating users about the risk can be beneficial. [1]

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