Vulnerability · Published May 19, 2025 · Assigned by GitHub_M
CVE-2025-26621OpenCTI vulnerable to Denial of Service through web hook
High 7.6
In plain English
A high-severity code injection in opencti from OpenCTI-Platform. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 37% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official 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.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| PyPI | pycti | 6.5.2 | PYSEC-2025-180 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| OpenCTI-Platform | opencti | < 6.5.2 |
Weakness: CWE-94 · Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:N/I:L/A:H