---
title: "CVE-2025-28384: OpenC3 COSMOS Vulnerable to Directory Traversal via /script-api/scripts/ endpoint"
url: https://erroneo.us/security/cve/CVE-2025-28384/
description: "CVE-2025-28384 (openc3-cosmos-tool-iframe (RubyGems)): An issue in the /script-api/scripts/ endpoint of OpenC3 COSMOS before 6.1.0 allows attackers to…"
type: vulnerability-record
section: "Security Digest"
date_published: 2025-06-13
date_modified: 2025-10-27
publisher: erroneo.us
author: erroneo.us Security Desk
cve: "CVE-2025-28384"
kev: false
cvss: 9.1
epss: 0.00886
license: All rights reserved. Quote with attribution and a link.
---

# CVE-2025-28384: OpenC3 COSMOS Vulnerable to Directory Traversal via /script-api/scripts/ endpoint

**Signal:** Critical and remotely reachable. No known exploitation yet, but it is network-reachable without credentials. (Computed from CISA KEV, EPSS and CVSS; not an editorial verdict.)

## Should you act?

- Not in CISA KEV , but CISA’s SSVC assessment records a public proof-of-concept, so attack code exists.
- EPSS 0.9% , percentile 59: FIRST’s model estimates a 0.9% chance of exploitation activity in the next 30 days, higher than 59% of all scored CVEs (moderate). EPSS is a probability, not a verdict.
- Remotely reachable with no login and no user interaction. If the vulnerable service is exposed to the internet, prioritize it.
- Only applies if your dependency tree includes openc3-cosmos-tool-iframe (RubyGems) = 6.0.0, no fixed version listed . Check your lockfile, including transitive dependencies.

## What it is

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

## Affected packages

- RubyGems `openc3-cosmos-tool-iframe` = 6.0.0 → fixed: none listed

## Affected products (CVE record)

- n/a n/a: see advisory

## Severity

- CISA-ADP CVSS 3.1: 9.1 `CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N`
- GitHub CVSS 3.1: 9.1 `CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N`

## Exploitation

- CISA KEV: not listed (no confirmed in-the-wild exploitation known to CISA).
- CISA SSVC assessment: exploitation poc , automatable yes , technical impact partial .
- FIRST EPSS (model of 2026-10-21): 0.89% probability of exploitation activity in the next 30 days; percentile 59.

## Sources

- [GitHub Advisory GHSA-p67j-387g-75wc](https://github.com/advisories/GHSA-p67j-387g-75wc)
- [CVE.org record CVE-2025-28384](https://www.cve.org/CVERecord?id=CVE-2025-28384)
- [NVD entry CVE-2025-28384](https://nvd.nist.gov/vuln/detail/CVE-2025-28384)
- [openc3.com](https://openc3.com/)
- [visionspace.com](https://visionspace.com/openc3-cosmos-a-security-assessment-of-an-open-source-mission-framework/)
- [github.com](https://github.com/OpenC3/cosmos/releases/tag/v6.1.0)
- [github.com](https://github.com/OpenC3/cosmos/pull/1828)
- [github.com](https://github.com/OpenC3/cosmos/pull/1828/commits/fc7e11310a7cdf9f1939886e1b29009db4d4b718)
- [github.com](https://github.com/rubysec/ruby-advisory-db/blob/master/gems/openc3-cosmos-tool-iframe/CVE-2025-28384.yml)

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Source page: https://erroneo.us/security/cve/CVE-2025-28384/ · Security Digest: https://erroneo.us/security/ · More: https://erroneo.us/llms.txt