CVE-2023-2639Network attack vector

Policy disclosure via unvalidated WebSocket origin

Published Jun 13, 2023 · Updated Jan 2, 2025

Origin validation error in Rockwell Automation FactoryTalk System Services 6.20 and earlier allows remote attackers to read policy data. The feedback mechanism accepts local WebSocket connections without verifying that their origin is a legitimate local client, letting hostile browser scripts wait for policy events. Exploitation requires an authenticated user to visit attacker-controlled content; disclosure is limited to installation status and potentially the entire security policy.

CVSS severity4.1
Medium
EPSS probability0.38%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Origin validation error in Rockwell Automation FactoryTalk System Services 6.20 and earlier allows remote attackers to read policy data. The feedback mechanism accepts local WebSocket connections without verifying that their origin is a legitimate local client, letting hostile browser scripts wait for policy events. Exploitation requires an authenticated user to visit attacker-controlled content; disclosure is limited to installation status and potentially the entire security policy.

The record

CVE
CVE-2023-2639
Published
Jun 13, 2023
Updated
Jan 2, 2025
Vendor
Rockwell Automation
Product
FactoryTalk System Services
Classifications
CWE-346, CAPEC-466, T1203
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jun 13, 2023CVE publishedPublication date reported by the CVE source.
  2. Jan 2, 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?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=<= 6.20

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Rockwell Automation · FactoryTalk System Servicesversion=<= 6.20

Published CVSS scores

4.1Rockwell AutomationCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/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.

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

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-346Origin Validation Error
CAPEC-466Leveraging Active Adversary in the Middle Attacks to Bypass Same Origin Policy
T1203Exploitation for Client Execution

Public exploit references

No public exploit references are available in this record.

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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