XSS in Citeum Opencti
CVE-2020-37044
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.
Vulnerability class: XSS (Cross-Site Scripting)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N.
EPSS exploit prediction
EPSS: 0.004 (32.9th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 33rd percentile — 32.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: +0.000
Affected products
- Citeum Opencti — versions 3.3.1
- Filigran Opencti — versions 3.3.1
Weakness classification (CWE)
References
- www.exploit-db.com/exploits/48595 (Exploit, VDB Entry, Third Party Advisory, exploit)
- www.opencti.io/ (Product, product)
- github.com/OpenCTI-Platform/opencti (Product, product)
- www.vulncheck.com/advisories/opencti-cross-site-scripting (Broken Link, third-party-advisory)
Frequently asked questions
- What is CVE-2020-37044?
- CVE-2020-37044 is a medium-severity vulnerability in Citeum Opencti, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2026-01-30.
- How severe is CVE-2020-37044?
- Medium severity. CVSS v3 base score is 5.4 out of 10.