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.
- 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
- None listed
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
Which versions are affected by CVE-2020-37044?
1 open source package ship an affected version, including pycti. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
pycti PyPI | All versions to 3.3.1 | None |
Products include 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.
Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.
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 OpenCTI privilege escalation and unauthenticated access via default admin account
- CVE-2026-39980 OpenCTI affected by RCE via notifier template
- CVE-2025-24977 OpenCTI has remote code execution and sensitive secrets exposed through web hook
- CVE-2024-26139 OpenCTI Authenticated Privilege Escalation
- CVE-2024-45404 OpenCTI's lack of Rate Limit lead to OTP brute forcing
Sources
Also known as GHSA-f8vp-6qv4-w6c7, PYSEC-2026-115.