CVE-2023-28657
Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.
NVD · uneditedImproper access control vulnerability exists in CONPROSYS HMI System (CHS) versions prior to 3.5.3. A user of the PC where the affected product is installed may gain an administrative privilege. As a result, information regarding the product may be obtained and/or altered by the user.
Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.
dbcve analysis · high confidenceThis is a local privilege escalation vulnerability in CONPROSYS HMI System (CHS). A local user on the PC where the affected product is installed can gain administrative privileges due to improper access controls, allowing them to obtain or alter product information.
Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.
Affected products & versions What the vendor confirmedThe version ranges the vendor confirmed as vulnerable. If your version sits inside a range here, treat yourself as exposed until you have upgraded.
NVD · CPE data< 3.5.3CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.
From the vector- Attack vector
- Network
- Complexity
- Low
- Privileges
- Low
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- High
- Availability
- High
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Am I affected? How to checkSteps we derive from the advisory and the affected-version data, so you can decide whether this CVE reaches your setup. They are a guide, not a scan — your own configuration is the authority.
dbcve checksWork through these to decide whether this CVE applies to you.
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Check if CONPROSYS HMI System is installedLook for the product in the Windows Add/Remove Programs list, or check common installation directories such as C:\Program Files\CONPROSYS or C:\Program Files (x86)\CONPROSYS for the CHS application foldersAffected if The product is found installed on the system
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Identify the installed version of CONPROSYS HMI SystemCheck the program version information. In Windows, right-click the executable (typically named CHS.exe or similar in the installation folder), select Properties, and view the Details tab for the Version field. Alternatively, check the Windows Registry under HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall for an entry related to Conprosys HMI System and review the DisplayVersion valueAffected if The displayed version number is lower than 3.5.3 or the version cannot be determined but the product is present
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Verify the service or process statusOpen Task Manager or Services.msc and look for a running service or process associated with CONPROSYS HMI System (often named conprosys_hmi, CHS, or similar). Also check for any HMI-related services running under a local or system accountAffected if The CONPROSYS HMI System service or process is running on the system and the version is below 3.5.3
If CONPROSYS HMI System is installed and the version is identified as less than 3.5.3, the environment is affected by this local privilege escalation vulnerability.
Generated from the published advisory. Verify against your own configuration.
Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.
dbcve · scoped3.5.3
Upgrade CONPROSYS HMI System to version 3.5.3 or later to remediate this vulnerability.
Conprosys HMI System version 3.5.3
- Upgrade CONPROSYS HMI System to version 3.5.3 or later
- Obtain the update from the official Contec download page at www.contec.com
- Apply the update following standard upgrade procedures for the CONPROSYS HMI System
Generated from the published advisory — verify against the referenced sources before acting.
- Consultation3.0 h
- Implementation4.0 h
- Testing3.0 h
- Review / QA2.0 h
An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $3,408.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2023-28657 — or any other known-vulnerable package — straight from your lock files. Free and open source; it runs locally and uploads nothing.
References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.
Primary sourcesPractitioner notes
ContributedPeer-ranked notes from engineers who’ve handled CVE-2023-28657 in production — separate from our analysis above.
The advisory tells you what broke. It rarely tells you what actually worked. If you’ve dealt with this one, that detail is what the next engineer is searching for.
- The version that genuinely resolved it — not the one the vendor claimed
- A config change or rule that shut the vector down
- A gotcha in the upgrade path that cost you an afternoon
No notes yet
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- Verified mitigations, workarounds, and config changes
- Version or environment caveats, and links to real fixes
- No weaponised exploit code, or anything meant to cause harm
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