CVE-2025-28388Public exploitNetwork attack vector

Non-admin API access via shared service password

Published Jun 13, 2025 · Updated Oct 27, 2025

Authentication bypass in OpenC3 COSMOS before 6.0.2 allows remote attackers to access the API with a shared service password. AuthModel.verify accepts OPENC3_SERVICE_PASSWORD as a valid token, and the login controller passed submitted credentials to that service-aware verifier. Knowledge of the shared password is sufficient for non-admin service-account access in the Core edition, including API calls used by running scripts.

CVSS severity9.8
Critical
EPSS probability0.61%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Authentication bypass in OpenC3 COSMOS before 6.0.2 allows remote attackers to access the API with a shared service password. AuthModel.verify accepts OPENC3_SERVICE_PASSWORD as a valid token, and the login controller passed submitted credentials to that service-aware verifier. Knowledge of the shared password is sufficient for non-admin service-account access in the Core edition, including API calls used by running scripts.

The record

CVE
CVE-2025-28388
Published
Jun 13, 2025
Updated
Oct 27, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-798, T1078
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 13, 2025CVE publishedPublication date reported by the CVE source.
  2. Oct 27, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

9.8CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-798Use of Hard-coded Credentials
T1078Valid Accounts

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo