CVE-2020-37044

MEDIUM

OpenCTI 3.3.1 - Reflected Cross-Site Scripting via GraphQL Endpoint

Title source: llm
STIX 2.1

Exploitation Summary

EIP tracks 1 public exploit for CVE-2020-37044. PoCs published by Raif Berkay Dincel.

AI-analyzed exploit summary This exploit demonstrates a directory traversal vulnerability in OpenCTI 3.3.1, allowing unauthorized access to sensitive files like /etc/passwd via a crafted GET request. It also includes a proof-of-concept for a reflected XSS vulnerability in the GraphQL endpoint.

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.

Exploits (1)

exploitdb WORKING POC
by Raif Berkay Dincel · textwebappsmultiple
https://www.exploit-db.com/exploits/48595

This exploit demonstrates a directory traversal vulnerability in OpenCTI 3.3.1, allowing unauthorized access to sensitive files like /etc/passwd via a crafted GET request. It also includes a proof-of-concept for a reflected XSS vulnerability in the GraphQL endpoint.

Classification
Working Poc 90%
Attack Type
Info Leak | Xss
Complexity
Trivial
Reliability
Reliable
Target: OpenCTI 3.3.1
No auth needed
Prerequisites: Network access to the target OpenCTI instance
devstral-2 · analyzed Feb 16, 2026 Full analysis →

References (4)

Core 4
Core References
Exploit, Third Party Advisory, VDB Entry exploit
https://www.exploit-db.com/exploits/48595
Product product
https://www.opencti.io/

Scores

CVSS v3 5.4
EPSS 0.0034
EPSS Percentile 26.3%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N

CISA SSVC

Vulnrichment
Exploitation poc
Automatable no
Technical Impact partial

Details

CWE
CWE-79
Status published
Products (1)
citeum/opencti 3.3.1
Published Jan 30, 2026
Tracked Since Feb 18, 2026