Vulnerability · Published Jan 30, 2026 · Assigned by VulnCheck

CVE-2020-37044OpenCTI 3.3.1 - Cross Site Scripting

Medium 5.4

In plain English

A medium-severity cross-site scripting in OpenCTI from Filigran. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 34% of all known vulnerabilities).

Severity (CVSS 3.1)5.4Medium

Exploit odds (30 days)0.4%top 66.4% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

Official 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.

Affected packages & fixed versions

Ecosystem	Package	Fixed in	Advisory
PyPI	pycti	no fix listed	PYSEC-2026-115

Affected products (as reported)

Vendor	Product	Versions
Filigran	OpenCTI	3.3.1

Weakness: CWE-79 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N

References

ExploitDB-48595 exploit
OpenCTI Official Homepage product
OpenCTI GitHub Repository product
VulnCheck Advisory: OpenCTI 3.3.1 - Cross Site Scripting third-party-advisory