What is CVE-2025-26621?

CVE-2025-26621 is a high-severity vulnerability in Opencti-platform Opencti, classified under Code Injection. CVSS score: 7.6/10. Published 2025-05-19.

How severe is CVE-2025-26621?

High severity. CVSS v3 base score is 7.6 out of 10.

RCE in Opencti-platform Opencti

CVE-2025-26621

OpenCTI is an open source platform for managing cyber threat intelligence knowledge and observables. Prior to version 6.5.2, any user with the capability manage customizations can edit webhook that will execute javascript code. This can be…

Vulnerability class: RCE (Remote Code Execution)

EPSS: 0.007 (73.0th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.6 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:N/I:L/A:H.

Affected products

Opencti-platform Opencti — versions < 6.5.2

Weakness classification (CWE)

CWE-94 — Code Injection

References

https://github.com/OpenCTI-Platform/opencti/security/advisories/GHSA-gq63-jm3h-374p (x_refsource_CONFIRM)
https://github.com/OpenCTI-Platform/opencti/security/advisories/GHSA-mf88-g2wq-p7qm (x_refsource_MISC)

Frequently asked questions

What is CVE-2025-26621?: CVE-2025-26621 is a high-severity vulnerability in Opencti-platform Opencti, classified under Code Injection. CVSS score: 7.6/10. Published 2025-05-19.
How severe is CVE-2025-26621?: High severity. CVSS v3 base score is 7.6 out of 10.