CVE-2025-62252 is an authorization bypass vulnerability classified under CWE-639 (Authorization Bypass Through User-Controlled Key) affecting Liferay Portal and Liferay DXP products. The flaw exists in versions 7.4.0 through 7.4.3.111 of Liferay Portal and multiple 2023 Q3 and Q4 releases of Liferay DXP, as well as older unsupported versions. The vulnerability arises from improper validation of the _com_liferay_users_admin_web_portlet_UsersAdminPortlet_addUserIds parameter, which is user-controlled. This parameter is used to assign organizations to users within the portal. Due to insufficient authorization checks, a remote authenticated user operating within one virtual instance can manipulate this parameter to assign an organization to a user in a different virtual instance, effectively crossing virtual instance boundaries. This breaks the intended isolation between virtual instances, potentially allowing unauthorized access or modification of organizational data. The vulnerability requires the attacker to have authenticated access (PR:L) but does not require user interaction (UI:N). The attack vector is network-based (AV:N) with low attack complexity (AC:L). The impact is primarily on integrity (VI:L) with no direct impact on confidentiality or availability. No patches or exploits are currently publicly available, but the vulnerability is publicly disclosed as of October 2025. Organizations using affected versions should consider this a medium-severity risk due to the potential for unauthorized organizational assignments and the implications for access control and data integrity within multi-tenant environments.

For European organizations, the impact of CVE-2025-62252 can be significant, especially for those deploying Liferay Portal or Liferay DXP in multi-tenant or virtual instance configurations. The vulnerability allows an authenticated user in one virtual instance to assign organizations to users in other virtual instances, potentially leading to unauthorized access to resources, privilege escalation, or data integrity issues. This cross-instance authorization bypass undermines tenant isolation, which is critical in environments where multiple business units or clients share the same Liferay infrastructure. In sectors such as finance, healthcare, government, and large enterprises where Liferay is used for intranet portals, collaboration, or customer engagement, unauthorized organizational assignments could lead to compliance violations (e.g., GDPR), data leakage risks, and operational disruptions. Although the vulnerability does not directly expose confidential data or cause denial of service, the integrity breach could facilitate further attacks or unauthorized data access. The medium CVSS score reflects the need for timely remediation to prevent exploitation, especially in environments with multiple virtual instances and sensitive organizational data.

To mitigate CVE-2025-62252, European organizations should: 1) Immediately identify and inventory all Liferay Portal and DXP instances, including version numbers and deployment configurations, focusing on multi-tenant or virtual instance setups. 2) Apply vendor patches or updates as soon as they become available; monitor Liferay’s official channels for security advisories and patches. 3) In the absence of patches, implement strict access controls limiting authenticated user permissions to only those necessary, minimizing the number of users who can perform organization assignments. 4) Employ web application firewalls (WAFs) with custom rules to detect and block suspicious parameter manipulation attempts targeting the _com_liferay_users_admin_web_portlet_UsersAdminPortlet_addUserIds parameter. 5) Conduct thorough logging and monitoring of organization assignment activities across virtual instances to detect anomalous behavior indicative of exploitation attempts. 6) Review and enforce tenant isolation policies and configurations to ensure virtual instance boundaries are respected. 7) Educate administrators and users about the risks of cross-instance authorization bypass and encourage prompt reporting of unusual access patterns. 8) Consider network segmentation or additional authentication layers for administrative portals to reduce the attack surface.