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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.

PUBLISHED Reserved 2026-01-28 | Published 2026-01-30 | Updated 2026-02-02 | Assigner VulnCheck




MEDIUM: 5.1CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N
MEDIUM: 5.4CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N

Problem types

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Product status

3.3.1
affected

Credits

Raif Berkay Dincel finder

References

www.exploit-db.com/exploits/48595 (ExploitDB-48595) exploit

www.opencti.io/ (OpenCTI Official Homepage) product

github.com/OpenCTI-Platform/opencti (OpenCTI GitHub Repository) product

www.vulncheck.com/advisories/opencti-cross-site-scripting (VulnCheck Advisory: OpenCTI 3.3.1 - Cross Site Scripting) third-party-advisory

cve.org (CVE-2020-37044)

nvd.nist.gov (CVE-2020-37044)

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