# CVE-2020-37044: OpenCTI 3.3.1 - Cross Site Scripting

> Attackers can execute arbitrary JavaScript in victims' browsers via a reflected XSS vulnerability in the OpenCTI GraphQL endpoint.

- **Severity:** Medium 5.1 (`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`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** A user has to click or open something
- **Fix available:** No
- **Published:** 30 Jan 2026
- **Updated:** 5 Mar 2026
- **Also known as:** GHSA-f8vp-6qv4-w6c7, PYSEC-2026-115

## What is CVE-2020-37044?

CVE-2020-37044 is a medium-severity cross-site scripting vulnerability in Filigran OpenCTI, published on 30 Jan 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.

### 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.

Weakness: CWE-79 (Improper Neutralization of Input During Web Page Generation)

## Which versions are affected by CVE-2020-37044?

1 open source package ship an affected version, including pycti. It affects 1 product.


| Package | Ecosystem | Affected | Fixed in |
| --- | --- | --- | --- |
| `pycti` | PyPI | All versions to 3.3.1 | None |

Products: Citeum Opencti.

## How do I fix CVE-2020-37044?

No fix has been published for CVE-2020-37044 yet. Limit exposure of the affected software until one is available.

## Is CVE-2020-37044 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2020-37044 exists.

## Other vulnerabilities in Filigran OpenCTI

- [CVE-2026-27960](https://insights.sbomify.com/CVE-2026-27960/): OpenCTI privilege escalation and unauthenticated access via default admin account (critical 9.8)
- [CVE-2026-39980](https://insights.sbomify.com/CVE-2026-39980/): OpenCTI affected by RCE via notifier template (critical 9.1)
- [CVE-2025-24977](https://insights.sbomify.com/CVE-2025-24977/): OpenCTI has remote code execution and sensitive secrets exposed through web hook (critical 9.1)
- [CVE-2024-26139](https://insights.sbomify.com/CVE-2024-26139/): OpenCTI Authenticated Privilege Escalation (high 8.3)
- [CVE-2024-45404](https://insights.sbomify.com/CVE-2024-45404/): OpenCTI's lack of Rate Limit lead to OTP brute forcing (high 8.1)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2020-37044 and fix it if it is affected.

What it is: CVE-2020-37044 is a medium-severity cross-site scripting vulnerability in Filigran OpenCTI, published on 30 Jan 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2020-37044 exists.

Affected packages and fixed versions:
- pycti (PyPI): affected all versions up to 3.3.1; no fix listed

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2020-37044/ (Markdown: https://insights.sbomify.com/CVE-2020-37044/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2020-37044
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2020-37044
- OSV: https://osv.dev/vulnerability/CVE-2020-37044

---
From sbomify Insights: https://insights.sbomify.com/CVE-2020-37044/
Summaries are generated and may contain mistakes; the official description above is the record.