CVE-2025-62256 is a vulnerability identified in Liferay Portal and Liferay DXP products affecting versions 7.4.0 through 7.4.3.109 and various 2023 Q3 and Q4 releases. The root cause is a missing authorization control (CWE-862) that fails to properly restrict access to the OpenAPI YAML file, which describes the API endpoints and operations of the portal. This flaw allows remote attackers to craft specific URLs to retrieve the OpenAPI specification without any authentication or user interaction. The OpenAPI YAML file can contain sensitive information about API endpoints, parameters, and potentially internal logic, which can be leveraged by attackers to perform further reconnaissance and targeted attacks such as injection, privilege escalation, or data exfiltration. The vulnerability is remotely exploitable over the network with low attack complexity and no privileges required, reflected in its CVSS 4.0 score of 6.9 (medium severity). While no public exploits have been reported yet, the exposure of API definitions is a significant security concern. The vulnerability affects multiple versions, including some older unsupported releases, increasing the risk for organizations that have not updated their Liferay installations. The lack of patch links suggests that either patches are pending or organizations must apply configuration changes or workarounds to mitigate the risk. Given Liferay's widespread use in enterprise portals, intranets, and customer-facing applications, this vulnerability could expose sensitive API details to unauthorized parties.

For European organizations, this vulnerability poses a risk of unauthorized information disclosure that can facilitate further attacks against critical web applications and backend services. The exposure of OpenAPI specifications can reveal internal API structures, authentication mechanisms, and business logic, enabling attackers to craft sophisticated exploits or automate attacks. This can lead to data breaches, service disruptions, or compromise of sensitive business processes. Organizations in sectors such as finance, government, healthcare, and telecommunications that rely on Liferay Portal or DXP for their digital services are particularly vulnerable. The medium severity rating indicates that while immediate system compromise is unlikely, the vulnerability significantly lowers the barrier for attackers to gain deeper insights into the target environment. Additionally, the lack of authentication requirements means that attackers can exploit this vulnerability remotely without needing valid credentials or user interaction, increasing the attack surface. The impact is exacerbated if the exposed APIs control sensitive operations or access confidential data. Therefore, European entities must assess their exposure and implement mitigations promptly to prevent potential exploitation.

1. Immediately identify and inventory all Liferay Portal and DXP instances within the organization to determine exposure. 2. Apply any available official patches or updates from Liferay as soon as they are released. 3. If patches are not yet available, restrict access to the OpenAPI endpoints by configuring web application firewalls (WAFs), reverse proxies, or network ACLs to block unauthorized requests to the OpenAPI YAML URL paths. 4. Implement authentication and authorization controls on API documentation endpoints to ensure only authorized users can access them. 5. Monitor web server and application logs for unusual or repeated access attempts to OpenAPI-related URLs, indicating potential reconnaissance activity. 6. Conduct internal security assessments and penetration testing to verify that OpenAPI files are not accessible without proper authorization. 7. Educate development and operations teams about the risks of exposing API specifications publicly and enforce secure coding and deployment practices. 8. Consider disabling or limiting the generation and exposure of OpenAPI documentation in production environments if not required. 9. Maintain an up-to-date asset management and vulnerability scanning program to detect similar issues proactively.