CVE-2025-3594: Liferay DXP Path Traversal Vulnerability

CVE-2025-3594 Overview

A path traversal vulnerability exists in Liferay Portal and Liferay Digital Experience Platform (DXP) affecting the downloading and installation of Xuggler. This vulnerability allows remote attackers to add files to arbitrary locations on the server and download and execute arbitrary files from the download server via the _com_liferay_server_admin_web_portlet_ServerAdminPortlet_jarName parameter. The flaw stems from improper input validation in the Server Admin portlet, which fails to properly sanitize user-supplied path inputs during the Xuggler installation process.

Critical Impact

Remote attackers can achieve arbitrary file write and remote code execution by exploiting the path traversal flaw in the Xuggler installation mechanism, potentially leading to complete server compromise.

Affected Products

• Liferay Portal 7.0.0 through 7.4.3.4
• Liferay DXP 7.4 GA
• Liferay DXP 7.3 GA through update 34 and older unsupported versions

Discovery Timeline

• June 16, 2025 - CVE-2025-3594 published to NVD
• December 12, 2025 - Last updated in NVD database

Technical Details for CVE-2025-3594

Vulnerability Analysis

This path traversal vulnerability (CWE-22) affects the Xuggler installation functionality within the Liferay Server Admin portlet. The vulnerability allows an attacker to manipulate the _com_liferay_server_admin_web_portlet_ServerAdminPortlet_jarName parameter to traverse directory structures and perform two distinct malicious operations: writing files to arbitrary locations on the server filesystem and downloading and executing arbitrary files from an attacker-controlled download server.

The attack requires network access and some user interaction, but does not require prior authentication, making it accessible to remote attackers who can reach the vulnerable endpoint. Successful exploitation can result in high impact to confidentiality, integrity, and availability of the affected system.

Root Cause

The root cause of this vulnerability lies in insufficient input validation and sanitization of the jarName parameter in the Server Admin portlet's Xuggler installation functionality. The application fails to properly validate path components, allowing directory traversal sequences (such as ../) to escape the intended installation directory. This enables attackers to specify arbitrary file paths outside the designated Xuggler installation location.

Attack Vector

The attack is network-based and targets the Server Admin portlet's Xuggler installation endpoint. An attacker crafts a malicious request containing path traversal sequences in the _com_liferay_server_admin_web_portlet_ServerAdminPortlet_jarName parameter. By manipulating this parameter, the attacker can:

1. Direct the server to write downloaded files to arbitrary filesystem locations, potentially overwriting critical system files or placing malicious executables in startup directories
2. Cause the server to download files from an attacker-controlled server and execute them, achieving remote code execution

The vulnerability mechanism relies on the application constructing file paths by directly concatenating user-supplied input without proper validation or canonicalization. When the server processes the Xuggler installation request, it uses the attacker-controlled jarName parameter to determine the download URL and target installation path, allowing path traversal attacks to succeed.

Detection Methods for CVE-2025-3594

Indicators of Compromise

• Unexpected HTTP requests to the Server Admin portlet containing path traversal sequences (../) in the jarName parameter
• Unusual file creation or modification events in directories outside the Liferay installation path
• Outbound connections from the Liferay server to unexpected external hosts during Xuggler-related operations
• Presence of unexpected JAR files or executables in system directories

Detection Strategies

• Monitor HTTP request logs for the ServerAdminPortlet endpoint with suspicious jarName parameter values containing ../ or encoded variants (%2e%2e%2f)
• Implement Web Application Firewall (WAF) rules to detect and block path traversal attempts in request parameters
• Deploy file integrity monitoring on critical server directories to detect unauthorized file modifications
• Configure network monitoring to alert on unusual outbound connections from web application servers

Monitoring Recommendations

• Enable detailed logging for the Liferay Server Admin portlet and review logs for anomalous Xuggler installation attempts
• Implement behavioral analysis to detect file system operations outside expected installation directories
• Monitor for process spawning from the Liferay application that may indicate successful code execution
• Configure SIEM correlation rules to link path traversal attempts with subsequent file system or network anomalies

How to Mitigate CVE-2025-3594

Immediate Actions Required

• Upgrade Liferay Portal to version 7.4.3.5 or later, or apply the latest Liferay DXP service pack addressing this vulnerability
• Restrict access to the Server Admin portlet to trusted administrators only using role-based access controls
• Disable the Xuggler installation functionality if not required for business operations
• Implement WAF rules to block requests containing path traversal patterns to the affected endpoint

Patch Information

Liferay has released security updates to address this vulnerability. Administrators should consult the Liferay Security Advisory for CVE-2025-3594 for the latest patch information and remediation guidance. Apply the most recent security updates for your specific Liferay Portal or DXP version.

Workarounds

• Restrict network access to the Server Admin portlet using firewall rules or network segmentation, limiting it to trusted management networks only
• Implement application-level input validation to reject requests containing directory traversal sequences in the jarName parameter
• Configure the Liferay server to run with minimal filesystem permissions, reducing the impact of successful path traversal attacks
• Disable the Xuggler feature entirely through portal configuration if audio/video conversion functionality is not required

# Example: Restrict access to Server Admin portlet via web server configuration
# Add to Apache/Nginx configuration to limit access by IP
<Location "/group/control_panel/manage/-/server_admin">
    Require ip 10.0.0.0/8
    Require ip 192.168.0.0/16
</Location>