CVE-2024-52399
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 · uneditedUnrestricted Upload of File with Dangerous Type vulnerability in Clarisse K. Writer Helper writer-helper allows Upload a Web Shell to a Web Server.This issue affects Writer Helper: from n/a through <= 3.1.6.
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 confidenceThe Writer Helper application (versions up to 3.1.6) contains an unrestricted file upload vulnerability allowing attackers to upload dangerous file types, specifically web shells, directly to the web server. This critical flaw enables remote code execution by bypassing file type restrictions and storing executable files in web-accessible locations.
Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.
CVSS 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
- Changed
- Confidentiality
- High
- Integrity
- High
- Availability
- High
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/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 the installed Writer Helper versionLocate the application version information in the product documentation, about page, or application metadata files (such as version.json, package.json, or similar config files in the installation directory)Affected if The installed version is 3.1.6 or any earlier version
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Locate the file upload functionalityReview the application URL endpoints and navigation to find any feature that accepts file uploads (typically forms with input type='file' or API endpoints accepting multipart/form-data)Affected if The application has an active file upload feature accessible to users
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Determine where uploaded files are storedInspect the application configuration files or server logs to identify the storage path for uploaded files. Check if this path is within the web server's document root or web-accessible directoryAffected if Uploaded files are stored in directories accessible via HTTP/HTTPS (web root or subdirectories served by the web server)
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Verify file type validation is enforcedExamine the application's upload handling code or configuration settings to determine if there is file type validation and whether it uses an allowlist approach or relies solely on file extension checkingAffected if The application lacks strict allowlist-based file type validation or allows executable extensions (.php, .asp, .jsp, .js, .exe, .sh, etc.)
A user is affected if they run Writer Helper version 3.1.6 or earlier, have the upload feature enabled, store uploads in web-accessible locations, and lack strict allowlist-based file type validation.
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 type validation, restrict uploaded files to non-executable extensions, store uploads outside the web root or in directories with script execution disabled, and apply proper authentication/authorization checks on all upload endpoints.
- Consultation6.0 h
- Implementation16.0 h
- Testing12.0 h
- Review / QA6.0 h
An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $11,136.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2024-52399 — 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-2024-52399 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