CVE-2019-20183
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 · unediteduploadimage.php in Employee Records System 1.0 allows upload and execution of arbitrary PHP code because file-extension validation is only on the client side. The attacker can modify global.js to allow the .php extension.
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 confidenceIn Employee Records System 1.0, the uploadimage.php endpoint performs file extension validation only on the client side via JavaScript in global.js. An attacker can bypass this by modifying the client-side validation logic to accept .php extensions, then upload malicious PHP files that execute on the server.
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= 1.0CVSS 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
- High
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- High
- Availability
- High
CVSS:3.1/AV:N/AC:L/PR:H/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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Confirm Employee Records System 1.0 is installedLook for the application files on the web server. The main index page typically contains 'Employee Records System' branding and the version may be visible in page source or readme files.Affected if The application directory structure for Employee Records System 1.0 exists on the server.
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Locate uploadimage.php endpointSearch for the file uploadimage.php in the web application directory. This file is typically found in the admin or upload-related folders of the application.Affected if The file uploadimage.php exists in the application.
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Inspect client-side validation in global.jsExamine the global.js file for JavaScript functions that validate file extensions before upload. Look for code that checks file extensions and determines which file types are allowed.Affected if The validation logic is implemented only in JavaScript (client-side) without corresponding server-side checks in uploadimage.php.
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Check upload directory is web-accessibleDetermine where uploaded files are stored by examining the uploadimage.php code. Verify if the upload directory is within the web document root and accessible via HTTP.Affected if Uploaded files are stored in a directory accessible via the web server, allowing potential execution of uploaded scripts.
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Test file upload with non-image extensionIf testing in an isolated environment, attempt to modify client-side validation (e.g., via browser dev tools) to allow .php files and upload a test PHP file to see if it is accepted and accessible.Affected if The server accepts and stores files with executable extensions like .php when client-side validation is bypassed.
The environment is affected if Employee Records System 1.0 is installed with the uploadimage.php endpoint that relies solely on client-side JavaScript validation and stores uploaded files in a web-accessible 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 server-side file validation in uploadimage.php that checks file type/content at the server, store uploads outside the webroot, and disable script execution in upload directories.
- Consultation1.0 h
- Implementation2.0 h
- Testing3.0 h
- Review / QA1.0 h
An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $1,904.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2019-20183 — 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-2019-20183 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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A place for practitioners to share what actually worked: a mitigation you’ve tested, a configuration change, a version- or environment-specific caveat, or a link to a verified patch. The most useful notes rise to the top as peers upvote them, so the signal stays high.
- 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