CVE-2023-31242Public exploitNetwork attack vector

Unauthenticated administrative access via missing admin account

Published Sep 5, 2023 · Updated Feb 13, 2025

Authentication bypass in Open Automation Software OAS Platform 18.00.0072 allows remote attackers to obtain administrative access. The OAS Engine accepts privileged protobuf requests without checking credentials when no admin application user exists or an unsaved admin configuration is lost after restart. A valid authentication structure is still required, and the access permits user creation and can be chained to reach the underlying host.

CVSS severity8.1
High
EPSS probability3.48%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Authentication bypass in Open Automation Software OAS Platform 18.00.0072 allows remote attackers to obtain administrative access. The OAS Engine accepts privileged protobuf requests without checking credentials when no admin application user exists or an unsaved admin configuration is lost after restart. A valid authentication structure is still required, and the access permits user creation and can be chained to reach the underlying host.

The record

CVE
CVE-2023-31242
Published
Sep 5, 2023
Updated
Feb 13, 2025
Vendor
Open Automation Software
Product
OAS Platform
Classifications
CWE-287, CWE-284, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Sep 5, 2023CVE publishedPublication date reported by the CVE source.
  2. Feb 13, 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=18.00.0072
  2. Affected versionversion=v18.00.0072

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Open Automation Software · OAS Platformversion=18.00.0072; version=v18.00.0072

Published CVSS scores

9.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
8.1Cisco TalosCVSS:3.1/AV:N/AC:H/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.

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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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-287Improper Authentication
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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