CVE-2023-34317Network attack vector

System access via unsanitized username storage

Published Sep 5, 2023 · Updated Feb 13, 2025

Improper input validation in OAS Platform 18.00.0072 allows remote authenticated users to store unsafe usernames in engine configuration. The OAS Engine User Creation handler accepts a protobuf String as a username without filtering inappropriate characters, then persists it to the running configuration. Application-administrator privileges are normally required; an authentication-bypass chain plus configuration saving turns an SSH-key username into underlying-system access.

CVSS severity6.5
Medium
EPSS probability0.88%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper input validation in OAS Platform 18.00.0072 allows remote authenticated users to store unsafe usernames in engine configuration. The OAS Engine User Creation handler accepts a protobuf String as a username without filtering inappropriate characters, then persists it to the running configuration. Application-administrator privileges are normally required; an authentication-bypass chain plus configuration saving turns an SSH-key username into underlying-system access.

The record

CVE
CVE-2023-34317
Published
Sep 5, 2023
Updated
Feb 13, 2025
Vendor
Open Automation Software
Product
OAS Platform
Classifications
CWE-20, T1136
Attack vector
network
Privileges
authenticated

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=v18.00.0072

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Open Automation Software · OAS Platformversion=v18.00.0072

Published CVSS scores

6.5Cisco TalosCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-20Improper Input Validation
T1136Create Account

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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