CVE-2018-20063
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 issue was discovered in Gurock TestRail 5.6.0.3853. An "Unrestricted Upload of File" vulnerability exists in the image-upload form (available in the description editor), allowing remote authenticated users to execute arbitrary code by uploading an image file with an executable extension but a safe Content-Type value, and then accessing it via a direct request to the file in the file-upload directory (if it's accessible according to the server configuration).
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 confidenceGurock TestRail 5.6.0.3853 contains an unrestricted file upload vulnerability in its image-upload form within the description editor. Authenticated users can upload files with executable extensions (e.g., .php) by manipulating the Content-Type header to appear as a safe image type, then execute the uploaded file via direct request if the upload directory is web-accessible.
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= 5.6.0.3853CVSS 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:3.0/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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Confirm Gurock TestRail installation and versionLocate the TestRail installation directory and identify the installed version number. This is typically found in application files, configuration, or the About section of the TestRail web interface.Affected if The installed version is exactly 5.6.0.3853
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Verify image upload feature accessibilityLog into TestRail as an authenticated user and navigate to the description editor where image upload functionality exists (such as in test case descriptions or milestone descriptions).Affected if The image upload form is accessible to authenticated users in the description editor
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Check upload directory web accessibilityDetermine the upload directory path used by TestRail for uploaded images. Verify if this directory is served by the web server and accessible via HTTP/HTTPS requests.Affected if The upload directory is web-accessible and allows direct request to uploaded files
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Confirm upload directory allows script executionInspect the web server configuration (Apache .htaccess, IIS handler mappings, or nginx config) for the upload directory to determine if script execution is permitted for file types like .php.Affected if Script execution is enabled in the upload directory, allowing uploaded executable files to run via direct request
You are affected if running TestRail version 5.6.0.3853 AND the upload directory is web-accessible with script execution enabled, allowing authenticated users to upload and execute malicious files.
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 server-side validation of file content/extension using an allowlist, store uploads outside the webroot or disable script execution in upload directories via web server configuration, and restrict upload functionality to authenticated users with business justification.
- Consultation4.0 h
- Implementation8.0 h
- Testing6.0 h
- Review / QA4.0 h
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Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2018-20063 — 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-2018-20063 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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