VulnerabilityAnalyzed

CVE-2025-26621

Prior to version 6.5.2, any user with the capability manage customizations can edit webhook that will execute javascript code.

MEDIUM 6.8EPSS 0.41%

Does this matter?

Lower severity and a low EPSS score (0.41%). Track it; it rarely justifies an emergency change on its own.

Description

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 abused to cause a denial of service attack by prototype pollution, making the node js server running the OpenCTI frontend become unavailable. Version 6.5.2 fixes the issue.

CVSS 3.1: 6.8 MEDIUMCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:N/I:N/A:H
EPSS: 0.41% probability · 34th percentile
CISA KEV: Not listed
Weakness: CWE-94, CWE-1321
Affected: citeum/opencti
Source: security-advisories@github.com

References

https://github.com/OpenCTI-Platform/opencti/security/advisories/GHSA-gq63-jm3h-374pVendor Advisory
https://github.com/OpenCTI-Platform/opencti/security/advisories/GHSA-mf88-g2wq-p7qmNot Applicable

Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.