CVE-2020-37044

MEDIUM 5.4

OpenCTI 3.3.1 - Cross Site Scripting

CVSS Score

5.4

EPSS Score

0.0%

EPSS Percentile

0th

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.

CWE	CWE-79
Vendor	filigran
Product	opencti
Published	Jan 30, 2026
Last Updated	Mar 5, 2026

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CVSS v3 Breakdown

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

Required

Scope

Unchanged

Confidentiality

Low

Integrity

Low

Availability

None

Affected Versions

Filigran / OpenCTI

3.3.1

References

NVD ↗ CVE.org ↗ EPSS Data ↗

exploit-db.com: https://www.exploit-db.com/exploits/48595 opencti.io: https://www.opencti.io/ github.com: https://github.com/OpenCTI-Platform/opencti vulncheck.com: https://www.vulncheck.com/advisories/opencti-cross-site-scripting

Credits

Raif Berkay Dincel