CVE-2025-56405Public exploitNetwork attack vector

Unauthenticated MCP access via unverified SSE connections

Published Sep 10, 2025 · Updated Sep 10, 2025

Missing authentication in Litmus Automation litmus-mcp-server 0.0.1 and earlier allows remote attackers to access the MCP service over SSE. The SSE transport accepts connections and exposes MCP operations without verifying the caller's identity, while the documented container configuration binds the service to 0.0.0.0. Any network client that can reach port 8000 can connect without credentials, with the published impact limited to confidential data exposure.

CVSS severity7.5
High
EPSS probability0.32%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Missing authentication in Litmus Automation litmus-mcp-server 0.0.1 and earlier allows remote attackers to access the MCP service over SSE. The SSE transport accepts connections and exposes MCP operations without verifying the caller's identity, while the documented container configuration binds the service to 0.0.0.0. Any network client that can reach port 8000 can connect without credentials, with the published impact limited to confidential data exposure.

The record

CVE
CVE-2025-56405
Published
Sep 10, 2025
Updated
Sep 10, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-306, CWE-284, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Sep 10, 2025CVE publishedPublication date reported by the CVE source.
  2. Sep 10, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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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

7.5CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

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.

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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-306Missing Authentication for Critical Function
CWE-284Improper Access Control
T1190Exploit Public-Facing Application

Public exploit references

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

Technologies

Your stack

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Your stack

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