CVE-2019-11887
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 · uneditedSimplyBook.me through 2019-05-11 does not properly restrict File Upload which could allow remote code execution.
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 · moderate confidenceSimplyBook.me contains an unrestricted file upload vulnerability in versions through 2019-05-11. The application fails to properly validate or restrict uploaded files, allowing attackers to upload malicious files (such as web shells) that can be executed for remote code execution 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<= 2019-05-11CVSS 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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Check the SimplyBook.me versionLocate the version information in the application admin panel, footer, or about page. Alternatively, check any version-related API endpoints or configuration files that may expose the build date.Affected if The installed version date is on or before 2019-05-11
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Verify file upload feature is accessibleConfirm that the file upload functionality is enabled and accessible to users or administrators in the application. Attempt to access the upload interface if present.Affected if File upload functionality is enabled and accessible to users
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Identify the upload directory locationExamine the server configuration, application settings, or .htaccess file to determine where uploaded files are stored. Check if the upload directory is within the web root (publicly accessible).Affected if Uploaded files are stored inside the web-accessible directory
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Check script execution restrictions on upload directoryInspect the web server configuration (Apache/Nginx), .htaccess file, or application config for the upload directory. Verify if script execution is explicitly disabled for that location.Affected if Script execution is NOT disabled in the upload directory (PHP, CGI, or other scripts can be executed)
You are affected if your SimplyBook.me version is dated 2019-05-11 or earlier AND file uploads are enabled AND uploads are stored in a web-accessible location where script execution is permitted.
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 file upload validation including allowlist of permitted file types, verification of file content/magic bytes, storage of uploads outside the web root, and disabling script execution in upload directories.
- Consultation4.0 h
- Implementation8.0 h
- Testing6.0 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 $6,176.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2019-11887 — 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-2019-11887 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