CVE-2020-37041

HIGH

OpenCTI 3.3.1 - Unauthenticated Directory Traversal via Static CSS Endpoint

Title source: llm
STIX 2.1

Exploitation Summary

EIP tracks 1 public exploit for CVE-2020-37041. 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 directory traversal attack via the static/css endpoint. An unauthenticated attacker can read arbitrary files from the filesystem by sending crafted GET requests with path traversal sequences (e.g., '../') in the URL. For example, requesting /static/css//../../../../../../../../etc/passwd returns the contents of /etc/passwd. 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 7.5
EPSS 0.0098
EPSS Percentile 57.7%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

CISA SSVC

Vulnrichment
Exploitation poc
Automatable no
Technical Impact partial

Details

CWE
CWE-22
Status published
Products (1)
citeum/opencti 3.3.1
Published Jan 30, 2026
Tracked Since Feb 18, 2026