CVE-2020-37041: Citeum Opencti

High severity, CVSS 7.5. EPSS: 1.1% chance of exploitation in the next 30 days.

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.

Affected products

• Citeum Opencti: version 3.3.1 only

Published 2026-01-30. Last modified 2026-06-17.