CVE-2023-46098

Unauthorized actions via overly permissive CORS policy

Published Nov 14, 2023 · Updated Jan 8, 2025

Cross-origin policy bypass in Siemens SIMATIC PCS neo before 4.1 allows attackers to trigger unauthorized actions through a user's browser. When PCS neo accesses the Information Server, its overly permissive CORS policy accepts requests from untrusted origins instead of restricting them to authorized sites. Exploitation requires adjacent-network access and interaction by a legitimate user; Siemens has not disclosed the exact actions or data exposed.

CVSS severity8.0
High
EPSS probability0.62%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Cross-origin policy bypass in Siemens SIMATIC PCS neo before 4.1 allows attackers to trigger unauthorized actions through a user's browser. When PCS neo accesses the Information Server, its overly permissive CORS policy accepts requests from untrusted origins instead of restricting them to authorized sites. Exploitation requires adjacent-network access and interaction by a legitimate user; Siemens has not disclosed the exact actions or data exposed.

The record

CVE
CVE-2023-46098
Published
Nov 14, 2023
Updated
Jan 8, 2025
Vendor
Siemens
Product
SIMATIC PCS neo
Classifications
CWE-942
Attack vector
adjacent
Privileges
unauthenticated

Timeline

How it unfolded

  1. Nov 14, 2023CVE publishedPublication date reported by the CVE source.
  2. Jan 8, 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=All versions < V4.1

What conditions does exploitation require?

Attack vectoradjacent
Required privilegesunauthenticated

What is affected?

Siemens · SIMATIC PCS neoversion=All versions < V4.1

Published CVSS scores

8.0Siemens AGCVSS:3.1/AV:A/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
8.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:R/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 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectoradjacent
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-942Permissive Cross-domain Policy with Untrusted Domains

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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