What is the CVSS score of EUVD-2025-18282?

EUVD-2025-18282 has a CVSS 3.1 base score of 7.5 (High). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N. EPSS exploitation probability: 1.1%.

Which versions of Cosmos are affected by EUVD-2025-18282?

OpenC3 COSMOS deployments are vulnerable to directory traversal attacks through the API tables endpoint, potentially allowing unauthorized access to sensitive files and system data.

Is there a public PoC exploit available for EUVD-2025-18282?

Yes, a public proof-of-concept exploit is available for EUVD-2025-18282. Prioritise patching immediately. EPSS: 1.1%.

How to fix or mitigate EUVD-2025-18282?

Within 24 hours: Inventory all OpenC3 COSMOS deployments and identify versions below 6.1.0; implement network-level access controls to restrict API endpoint exposure. Within 7 days: Deploy WAF rules to block directory traversal patterns (../, ..\ sequences) targeting the /tables endpoint; monitor access logs for exploitation attempts. Within 30 days: Upgrade to OpenC3 COSMOS 6.1.0 or later when patch becomes available; conduct forensic review of access logs for indicators of compromise.

Cosmos EUVD-2025-18282

| CVE-2025-28382 HIGH

Path Traversal (CWE-22)

2025-06-13 cve@mitre.org

GHSA-cf8v-5mrc-jv7f

Path Traversal Cosmos

7.5

CVSS 3.1 · NVD

Severity by source

NVD PRIMARY

7.5 HIGH

AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

None

Availability

None

Lifecycle Timeline

EUVD ID Assigned

Mar 14, 2026 - 21:34 euvd

EUVD-2025-18282

Analysis Generated

Mar 14, 2026 - 21:34 vuln.today

PoC Detected

Oct 27, 2025 - 16:15 vuln.today

Public exploit code

CVE Published

Jun 13, 2025 - 14:15 nvd

HIGH 7.5

DescriptionCVE.org

An issue in the openc3-api/tables endpoint of OpenC3 COSMOS before 6.1.0 allows attackers to execute a directory traversal.

AnalysisAI

Directory traversal vulnerability in OpenC3 COSMOS versions before 6.1.0 that allows unauthenticated remote attackers to read arbitrary files from the server via the openc3-api/tables endpoint. This high-severity issue (CVSS 7.5) enables confidentiality breaches without requiring authentication or user interaction, potentially exposing sensitive configuration files, credentials, and operational data managed by the COSMOS command and control system.

Technical ContextAI

OpenC3 COSMOS is a command and control software framework commonly used in aerospace, satellite, and space operations. The vulnerability exists in the REST API endpoint '/openc3-api/tables' which fails to properly sanitize user-supplied path parameters before using them in file system operations. This is a classic CWE-22 (Improper Limitation of a Pathname to a Restricted Directory/'Path Traversal') vulnerability where attackers can use directory traversal sequences (e.g., '../../../etc/passwd') to access files outside the intended application directory. The affected software is OpenC3 COSMOS (CPE: cpe:2.3:a:openc3:cosmos) with versions from initial release through 6.0.x being vulnerable. The endpoint likely processes table data from user-controlled input without implementing proper canonicalization or whitelist-based path validation.

RemediationAI

PATCH: Upgrade to OpenC3 COSMOS version 6.1.0 or later; priority: IMMEDIATE; details: Version 6.1.0 contains fixes for the directory traversal vulnerability in the openc3-api/tables endpoint WORKAROUND: If immediate patching is not possible, disable or restrict network access to the /openc3-api/tables endpoint; details: Implement web application firewall (WAF) rules to block requests containing directory traversal patterns (../, ..\ encoded variants) to this specific endpoint. Monitor for suspicious activity patterns. MITIGATION: Implement defense-in-depth controls; details: 1) Restrict API access via network segmentation (only authorized systems should reach COSMOS API); 2) Deploy rate limiting on the tables endpoint; 3) Enable comprehensive API request logging with alerting for path traversal patterns; 4) Run COSMOS with minimal file system permissions (principle of least privilege); 5) Consider deploying a reverse proxy that normalizes/validates URL paths before forwarding VERIFICATION: After patching, verify the fix; details: Test that requests like GET /openc3-api/tables?table=../../../../etc/passwd are rejected or return no sensitive data. Confirm COSMOS version is 6.1.0+ via API or application metadata endpoints