CVE-2025-43773: Liferay DXP Auth Bypass Vulnerability

CVE-2025-43773 Overview

CVE-2025-43773 is a security vulnerability affecting Liferay Portal and Liferay Digital Experience Platform (DXP) that allows improper access through the expandoTableLocalService. This vulnerability stems from missing authorization checks (CWE-862), enabling authenticated users with elevated privileges to potentially access or modify data beyond their intended permissions through the Expando framework, which is Liferay's mechanism for extending data models with custom attributes.

Critical Impact

Authenticated attackers with administrative privileges can exploit missing authorization checks in the expandoTableLocalService to gain unauthorized access to sensitive expando table data, potentially leading to information disclosure or data manipulation across the Liferay platform.

Affected Products

• Liferay Portal 7.4.0 through 7.4.3.132
• Liferay DXP 2025.Q2.0, 2025.Q1.0 through 2025.Q1.14
• Liferay DXP 2024.Q4.0 through 2024.Q4.7, 2024.Q3.0 through 2024.Q3.13
• Liferay DXP 2024.Q2.0 through 2024.Q2.13, 2024.Q1.1 through 2024.Q1.18
• Liferay DXP 7.4 GA through update 92

Discovery Timeline

• 2025-08-29 - CVE-2025-43773 published to NVD
• 2025-12-16 - Last updated in NVD database

Technical Details for CVE-2025-43773

Vulnerability Analysis

This vulnerability is classified as Missing Authorization (CWE-862), which occurs when the software does not perform an authorization check when an actor attempts to access a resource or perform an action. In the context of Liferay Portal and DXP, the expandoTableLocalService component fails to properly validate whether the requesting user has appropriate permissions to access or manipulate expando table data.

The Expando framework in Liferay is a powerful feature that allows administrators and developers to add custom attributes to existing Liferay entities without modifying the underlying database schema. This makes it an attractive target for attackers seeking to access or modify extended data attributes across the platform.

The vulnerability requires network access and high privileges for exploitation, along with user interaction, which limits the attack surface. However, successful exploitation could result in unauthorized read and write access to sensitive custom attribute data stored within the expando tables.

Root Cause

The root cause of CVE-2025-43773 lies in the expandoTableLocalService component, which lacks proper authorization validation before processing requests. When authenticated users with administrative privileges interact with this service, the application fails to verify whether the specific operation being requested falls within the user's authorized scope. This oversight allows privilege abuse scenarios where high-privileged users can access expando table data that should be restricted based on organizational boundaries or data classification.

Attack Vector

The attack vector for this vulnerability is network-based, requiring the attacker to have authenticated access to the Liferay platform with elevated privileges. The exploitation scenario involves:

1. An attacker obtains or possesses administrative-level credentials for the Liferay instance
2. The attacker crafts requests to the expandoTableLocalService endpoint
3. Due to missing authorization checks, the service processes requests without validating scope permissions
4. The attacker gains access to or modifies expando table data beyond their authorized boundaries

The vulnerability requires user interaction, suggesting that social engineering or other techniques may be needed to complete the attack chain. Successful exploitation can lead to confidentiality and integrity impacts on both the vulnerable system and potentially connected systems.

Detection Methods for CVE-2025-43773

Indicators of Compromise

• Unusual access patterns to expandoTableLocalService APIs from administrative accounts
• Audit log entries showing bulk queries or modifications to expando tables outside normal business operations
• Unexpected changes to custom attribute values on entities across the platform
• Administrative API calls targeting expando tables from unusual source IPs or at abnormal times

Detection Strategies

• Enable verbose logging for all expandoTableLocalService operations and monitor for anomalous request patterns
• Implement application-level monitoring to detect excessive or unusual API calls to expando-related endpoints
• Configure SIEM rules to alert on administrative actions targeting expando tables outside established baselines
• Deploy endpoint detection and response (EDR) solutions to monitor Liferay application server behavior

Monitoring Recommendations

• Review Liferay audit logs regularly for suspicious administrative activity involving expando tables
• Establish baseline metrics for normal expando table access patterns and alert on deviations
• Monitor network traffic to and from Liferay servers for unusual API request volumes
• Implement user behavior analytics (UBA) to detect privilege abuse by administrative accounts

How to Mitigate CVE-2025-43773

Immediate Actions Required

• Review the Liferay Security Advisory CVE-2025-43773 for official guidance and patches
• Audit administrative account access and implement least-privilege principles for expando table operations
• Enable comprehensive audit logging for all expando-related API endpoints
• Restrict network access to administrative interfaces using firewall rules or WAF configurations
• Review recent expando table modifications for signs of unauthorized access or data manipulation

Patch Information

Liferay has acknowledged this vulnerability and published a security advisory. Organizations should consult the Liferay Security Advisory CVE-2025-43773 for the latest patch information and upgrade guidance. Customers are advised to upgrade to patched versions of Liferay Portal or DXP as recommended by the vendor.

Workarounds

• Implement network segmentation to limit access to Liferay administrative interfaces to trusted networks only
• Apply additional authentication controls such as multi-factor authentication (MFA) for administrative accounts
• Configure web application firewall (WAF) rules to monitor and restrict access to expando-related API endpoints
• Conduct regular access reviews of administrative privileges and remove unnecessary elevated permissions
• Consider temporarily disabling or restricting access to custom attribute functionality if not business-critical

# Example: Restrict access to Liferay administrative interfaces at the network level
# Add firewall rules to limit access to trusted IP ranges only
iptables -A INPUT -p tcp --dport 8080 -s 10.0.0.0/8 -j ACCEPT
iptables -A INPUT -p tcp --dport 8080 -j DROP

# Review administrative accounts with access to expando services
# Liferay Control Panel > Users > Roles > Regular Roles
# Audit roles with permissions including "com.liferay.expando.kernel.service"