CVE-2023-28824Network attack vector

Restricted database access via query setting bypass

Published Jun 1, 2023 · Updated Jan 9, 2025

Server-side request forgery in CONTEC CONPROSYS HMI System before 3.5.3 allows remote authenticated users to access restricted databases. The query settings page fails to enforce its database destination restriction, causing the server to connect to a database outside the intended set. Administrative product access is required; successful exploitation exposes database content and, according to CONTEC, permits data theft or tampering.

CVSS severity4.3
Medium
EPSS probability0.64%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Server-side request forgery in CONTEC CONPROSYS HMI System before 3.5.3 allows remote authenticated users to access restricted databases. The query settings page fails to enforce its database destination restriction, causing the server to connect to a database outside the intended set. Administrative product access is required; successful exploitation exposes database content and, according to CONTEC, permits data theft or tampering.

The record

CVE
CVE-2023-28824
Published
Jun 1, 2023
Updated
Jan 9, 2025
Vendor
CONTEC Co., Ltd.
Product
CONPROSYS HMI System (CHS)
Classifications
CWE-918, CAPEC-664
Attack vector
network
Privileges
admin

Timeline

How it unfolded

  1. Jun 1, 2023CVE publishedPublication date reported by the CVE source.
  2. Jan 9, 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=versions prior to 3.5.3

What conditions does exploitation require?

Attack vectornetwork
Required privilegesadmin

What is affected?

CONTEC Co., Ltd. · CONPROSYS HMI System (CHS)version=versions prior to 3.5.3

Published CVSS scores

4.9NIST NVDCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N
4.3CONTEC Co., Ltd.CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/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
Privilegesadmin
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-918Server-Side Request Forgery (SSRF)
CAPEC-664Server Side Request Forgery

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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