CVE-2025-43782 is an Insecure Direct Object Reference (IDOR) vulnerability identified in Liferay Portal versions 7.4.0 through 7.4.3.124 and multiple versions of Liferay DXP (2024.Q2.0 through 2024.Q2.7, 2024.Q1.1 through 2024.Q1.12, and 7.4 GA through update 92). This vulnerability arises due to improper authorization checks when accessing workflow definitions via the API. Specifically, remote authenticated users can access workflow definitions by name without proper permission validation, effectively bypassing authorization controls. The underlying weakness corresponds to CWE-639, which involves authorization bypass through user-controlled keys. The vulnerability does not require user interaction and can be exploited remotely over the network with low attack complexity. The CVSS v4.0 base score is 5.3 (medium severity), reflecting that the attack vector is network-based, no user interaction is needed, and privileges required are low (authenticated user). The impact is limited to confidentiality, as the vulnerability allows unauthorized access to workflow definitions but does not affect integrity or availability. No known exploits are currently reported in the wild, and no patches are linked yet. The vulnerability affects the API layer of Liferay Portal and DXP products, which are widely used enterprise content management and collaboration platforms.

For European organizations using Liferay Portal or Liferay DXP, this vulnerability could lead to unauthorized disclosure of sensitive workflow definitions. Workflow definitions often contain business process logic, approval chains, and operational procedures, which if exposed, could aid attackers in crafting targeted attacks or social engineering campaigns. While the vulnerability does not directly allow modification or disruption of services, the unauthorized access to internal workflow configurations could compromise confidentiality and potentially facilitate further attacks. Organizations in sectors such as finance, government, healthcare, and manufacturing that rely on Liferay for internal portals or collaboration platforms may face increased risk. The medium severity rating indicates a moderate risk, but the impact could be significant if combined with other vulnerabilities or insider threats. Since exploitation requires authenticated access, the threat is more relevant in environments with weak authentication controls or where user credentials can be compromised or misused.

To mitigate this vulnerability, European organizations should: 1) Immediately review and restrict user permissions to ensure that only authorized personnel have access to workflow management APIs and related resources. 2) Implement strong authentication mechanisms, including multi-factor authentication (MFA), to reduce the risk of credential compromise. 3) Monitor API access logs for unusual or unauthorized attempts to access workflow definitions by name. 4) Apply the latest security updates and patches from Liferay as soon as they become available, even though no patch links are currently provided. 5) Conduct an internal audit of workflow definitions to identify and protect sensitive business processes. 6) Consider implementing additional API gateway or web application firewall (WAF) rules to detect and block unauthorized API calls targeting workflow definitions. 7) Educate users about the risks of credential sharing and phishing to reduce the likelihood of authenticated attackers exploiting this vulnerability.