Executive Summary

CVE-2025-43781 is a reflected cross-site scripting (XSS) vulnerability in the search bar portlet of Liferay Portal and Liferay DXP. It allows remote attackers to inject arbitrary web scripts or HTML via the URL parameter in the search bar, which can lead to malicious script execution within the context of the affected web application. [1]

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Impact Analysis

This vulnerability can allow attackers to execute malicious scripts in the context of the affected web application, potentially leading to user session hijacking, defacement, or redirection to malicious sites. However, the impact on confidentiality and integrity is low, and no impact on availability is noted. User interaction is required for exploitation. [1]

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Detection Guidance

This vulnerability can be detected by testing the search bar portlet URL parameters for reflected cross-site scripting (XSS) payloads. You can manually test by injecting common XSS test scripts into the URL parameter of the search bar and observing if the script is executed or reflected in the response. For example, you can use curl or a browser to send requests with payloads such as <script>alert(1)</script> in the URL parameter and check the response for script execution or reflection. Automated tools like OWASP ZAP or Burp Suite can also be used to scan for reflected XSS vulnerabilities in the search bar portlet URLs. [1]

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Mitigation Strategies

The immediate mitigation step is to upgrade affected Liferay Portal and Liferay DXP versions to the fixed versions where the vulnerability is resolved. Specifically, upgrade to Liferay Portal 7.4.3.129 or later, and Liferay DXP 2024.Q1.13, 2024.Q3.9, or 2024.Q4.0 or later. Additionally, as a temporary measure, you can implement web application firewall (WAF) rules to block or sanitize suspicious input in the search bar URL parameters to prevent script injection until the upgrade is applied. [1]

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