05 – 11 May 2025

A critical security vulnerability has been identified in the OpenCTI Platform which is designed to structure, store, organize and visualize technical and non-technical information about cyber threats. This vulnerability, tracked as CVE-2025-24977 is our new CVEofTheWeek with an assigned CVSS score of 9.1. It could allow attackers to execute commands on the hosting infrastructure and access secrets.

The security weakness is found in OpenCTI’s web-hook functionality. As outlined in the advisory, this feature enables users to tailor messages transmitted through web-hooks. It operates using JavaScript, which users can input into a web-hook template field.

The primary concern is that a malicious user could exploit this mechanism to execute commands within the hosting environment where OpenCTI runs. Although a protective layer has been implemented to block external modules in JavaScript code used for web-hooks, these safeguards can still be circumvented.

Furthermore, OpenCTI’s container-based deployments poses a security risk, as attackers could exploit web-hook JavaScript to access sensitive environment variables. Successful exploitation could lead to a wide range of malicious activities, including data breaches, system compromise, and lateral movement within the affected network.

The affected version of OpenCTI Platform is 6.4.8 and the patched version, which resolves this vulnerability, is 6.4.11.

Users of the OpenCTI Platform are strongly advised to upgrade OpenCTI Platform instance to version 6.4.11 or later to mitigate the risk posed by CVE-2025-24977.

Recommended Action:

• Upgrade to OpenCTI latest version
• Review user permissions, especially for the ‘manage customizations’ capability, and restrict them to trusted individuals.
• Audit webhook configurations to ensure they are not susceptible to misuse

Official advisory: https://github.com/OpenCTI-Platform/opencti/security/advisories/GHSA-mf88-g2wq-p7qm

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