OpenCTI 3.3.1 is vulnerable to a reflected cross-site scripting (XSS) attack via the /graphql endpoint. An attacker can inject arbitrary JavaScript code by sending a crafted GET request with a malicious payload in the query string, leading to execution of JavaScript in the victim's browser. For example, a request to /graphql?'"--></style></scRipt><scRipt>alert('Raif_Berkay')</scRipt> will trigger an alert. This vulnerability was discovered by Raif Berkay Dincel and confirmed on Linux Mint and Windows 10.

Metrics

Attack Vector Network

Attack Complexity Low

Privileges Required None

Attack Requirements None

User Interaction Active

Vulnerable System Confidentiality Impact None

Vulnerable System Integrity Impact None

Vulnerable System Availability Impact None

Subsequent System Confidentiality Impact Low

Subsequent System Integrity Impact Low

Subsequent System Availability Impact None

Attack Vector Network

Attack Complexity Low

Privileges Required None

Scope Unchanged

Confidentiality Impact Low

Integrity Impact Low

Availability Impact None

User Interaction Required

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

The EPSS score is 0.00019.

Exploitation poc

Automatable no

Technical Impact partial

Affected Vendors & Products

Vendors Products
Citeum Subscribe
Opencti Subscribe
Opencti-platform Subscribe
Opencti Subscribe

Configuration 1 [-]

cpe:2.3:a:citeum:opencti:3.3.1:*:*:*:*:*:*:*

No data.

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Vendors Products
Opencti-platform Subscribe
Opencti Subscribe
Advisories

No advisories yet.

Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References
Link Providers
https://github.com/OpenCTI-Platform/opencti cve-icon cve-icon
https://www.exploit-db.com/exploits/48595 cve-icon cve-icon
https://www.opencti.io/ cve-icon cve-icon
https://www.vulncheck.com/advisories/opencti-cross-site-scripting cve-icon cve-icon
History

Fri, 13 Feb 2026 18:00:00 +0000

Type Values Removed Values Added
First Time appeared Citeum
Citeum opencti
CPEs cpe:2.3:a:citeum:opencti:3.3.1:*:*:*:*:*:*:*
Vendors & Products Citeum
Citeum opencti

Tue, 03 Feb 2026 15:00:00 +0000

Type Values Removed Values Added
First Time appeared Opencti-platform
Opencti-platform opencti
Vendors & Products Opencti-platform
Opencti-platform opencti

Mon, 02 Feb 2026 20:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'poc', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Fri, 30 Jan 2026 22:30:00 +0000

Type Values Removed Values Added
Description OpenCTI 3.3.1 is vulnerable to a reflected cross-site scripting (XSS) attack via the /graphql endpoint. An attacker can inject arbitrary JavaScript code by sending a crafted GET request with a malicious payload in the query string, leading to execution of JavaScript in the victim's browser. For example, a request to /graphql?'"--></style></scRipt><scRipt>alert('Raif_Berkay')</scRipt> will trigger an alert. This vulnerability was discovered by Raif Berkay Dincel and confirmed on Linux Mint and Windows 10.
Title OpenCTI 3.3.1 - Cross Site Scripting
Weaknesses CWE-79
References
Metrics cvssV3_1

{'score': 5.4, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N'}

cvssV4_0

{'score': 5.1, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N'}

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: VulnCheck

Published:

Updated: 2026-03-05T01:27:39.756Z

Reserved: 2026-01-28T18:18:30.524Z

Link: CVE-2020-37044

cve-icon Vulnrichment

Updated: 2026-02-02T20:08:06.739Z

cve-icon NVD

Status : Analyzed

Published: 2026-01-30T23:16:10.257

Modified: 2026-02-13T17:55:30.910

Link: CVE-2020-37044

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-02-02T09:27:08Z

Weaknesses