Executive Summary

CVE-2025-43776 is a stored cross-site scripting (XSS) vulnerability in Liferay Portal and Liferay DXP. It occurs because the Process Builder's Configuration tab does not properly escape JavaScript code injected through the Custom Object field label. This allows a remote authenticated attacker with high privileges to inject malicious JavaScript payloads that are stored and later executed within the Process Builder interface without proper sanitization. [1]

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Impact Analysis

This vulnerability can allow a remote authenticated attacker with high privileges to execute malicious JavaScript code within the Process Builder interface. This could lead to low impact on confidentiality and integrity, such as unauthorized script execution or manipulation of the interface, but it requires user interaction and high privileges. The overall impact is considered low to moderate based on the CVSS score of 4.6. [1]

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Detection Guidance

Detection of this vulnerability involves checking for the presence of malicious JavaScript payloads injected via the Custom Object field label in the Process Builder's Configuration tab of affected Liferay Portal or DXP versions. Since it is a stored XSS vulnerability requiring authenticated access with high privileges, manual inspection of Custom Object field labels and Process Builder configurations for suspicious scripts is recommended. Automated scanning tools or custom scripts that query the Process Builder configurations for unexpected JavaScript code may help. Specific commands are not provided in the available resources. [1]

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Mitigation Strategies

Immediate mitigation steps include upgrading affected Liferay Portal or DXP instances to fixed versions: Liferay Portal on the master branch, Liferay DXP 2024.Q1.20 or later, Liferay DXP 2025.Q1.17 or later, and Liferay DXP 2025.Q2.10 or later. Until upgrades can be applied, restrict high-privilege authenticated user access to the Process Builder's Configuration tab to trusted personnel only, and monitor for suspicious activity involving Custom Object field labels. Avoid allowing untrusted users to create or modify Custom Object fields. [1]

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