Can you explain this vulnerability to me?

CVE-2025-62256 is a security vulnerability in Liferay Portal and Liferay DXP where certain affected versions do not properly restrict access to the OpenAPI YAML file. This allows remote attackers to bypass authentication and access the OpenAPI endpoint by using a specially crafted URL. [1]

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How can this vulnerability impact me? :

This vulnerability allows remote attackers to access the OpenAPI YAML file without authentication, potentially exposing API definitions and details that could be used for further attacks or reconnaissance. However, it does not impact integrity, availability, or safety directly according to the CVSS metrics. [1]

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How can this vulnerability be detected on my network or system? Can you suggest some commands?

You can detect this vulnerability by attempting to access the OpenAPI YAML file via a crafted URL on your Liferay Portal or DXP instance. For example, you can use curl or wget commands to request the OpenAPI endpoint and check if the YAML file is accessible without authentication. A sample command might be: curl -i http://<liferay-server>/o/openapi/openapi.yaml. If the file is accessible without proper authentication, your system is vulnerable. [1]

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What immediate steps should I take to mitigate this vulnerability?

The immediate mitigation step is to upgrade your Liferay Portal or DXP to a fixed version where the vulnerability is addressed. Specifically, upgrade to Liferay Portal 7.4.3.110 or later, or Liferay DXP 2024.Q1.1, 2023.Q4.6, or 2023.Q3.8 or later. Until you can upgrade, restrict access to the OpenAPI endpoint via network controls or web server configuration to prevent unauthorized access. [1]

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