CVE-2018-7836
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 · uneditedAn unrestricted Upload of File with Dangerous Type vulnerability exists on numerous methods of the IIoT Monitor 3.1.38 software that could allow upload and execution of malicious files.
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 confidenceUnrestricted file upload vulnerability in IIoT Monitor 3.1.38 affecting multiple methods allows attackers to upload files with dangerous executable types (e.g., PHP, ASP, JSP web shells) and directly execute them on the server, achieving remote code execution without authentication.
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= 3.1.38CVSS 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
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- High
- Availability
- High
CVSS:3.0/AV:N/AC:L/PR:N/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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Identify IIoT Monitor installation versionLocate the installed IIoT Monitor application and check its version number (typically visible in the application UI, about page, or installation metadata)Affected if The installed version is exactly 3.1.38
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Verify file upload functionality existsIdentify if the IIoT Monitor application includes any file upload capability (check for upload endpoints, import features, or file transfer interfaces in the web application)Affected if File upload functionality is present and accessible in the application
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Check if upload endpoints require authenticationAttempt to access or examine the file upload endpoint configuration to determine if authentication is enforced before uploadAffected if Upload endpoints are accessible without requiring valid authentication credentials
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Determine uploaded file storage locationExamine the application configuration or file system to identify where uploaded files are stored (whether inside or outside the web document root)Affected if Uploaded files are stored within the web server's document root or a publicly accessible directory
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Check for script execution restrictions on upload directoryReview web server or application configuration to determine if the upload directory permits execution of uploaded script files (PHP, ASP, JSP, etc.)Affected if The upload directory allows execution of server-side scripts (no execution restrictions configured)
You are affected if IIoT Monitor version 3.1.38 is installed AND file upload functionality exists with no authentication requirement AND uploaded files can be executed from their storage location.
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.
From vendor dataImplement strict allowlist-based file validation (extension, MIME type, magic bytes), store uploads outside web root with no script execution permissions, and add authentication/authorization checks to all upload endpoints.
- Consultation6.0 h
- Implementation16.0 h
- Testing8.0 h
- Review / QA4.0 h
An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $9,600.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2018-7836 — 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-2018-7836 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
- No spam, self-promotion, credentials, or personal data