CVE-2024-53303
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 · uneditedA remote code execution (RCE) vulnerability in the upload_file function of LRQA Nettitude PoshC2 after commit 123db87 allows authenticated attackers to execute arbitrary code via a crafted POST request.
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 confidenceThis is an authenticated remote code execution vulnerability in the upload_file function of LRQA Nettitude PoshC2. Attackers with valid credentials can send a crafted POST request to this function to upload malicious files that get executed on the target system, leading to full system compromise.
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
- Unchanged
- Confidentiality
- High
- Integrity
- High
- Availability
- High
CVSS:3.1/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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Identify PoshC2 installation and versionLocate the PoshC2 installation directory and check the version file or run 'python -m PoshC2 --version' if installed as a moduleAffected if The installed PoshC2 version falls within the affected range and has not been patched
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Verify upload_file endpoint exposureCheck the PoshC2 API configuration files for routes/endpoints related to 'upload_file' or file upload functionality - typically found in the API definition filesAffected if The upload_file endpoint is exposed and accessible without additional access controls beyond basic authentication
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Confirm authentication configurationReview PoshC2 user authentication settings and API access controls to determine what credentials can access the upload_file functionAffected if The upload_file function permits access to any authenticated user rather than being restricted to highly privileged admins only
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Check uploaded file storage locationInspect PoshC2 configuration to identify where uploaded files are stored and whether they are placed in a web-accessible directoryAffected if Uploaded files are stored in a location accessible via HTTP/HTTPS and can be executed directly
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Review recent upload_file API activityCheck PoshC2 logs or audit trails for POST requests to the upload_file endpoint, looking for unusual file names or patternsAffected if There are any POST requests to upload_file from users who should not have elevated upload privileges
A user is affected if they are running a vulnerable PoshC2 version where the upload_file function is accessible to authenticated users and stores files in an executable 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 dataRestrict upload_file function access to only strictly necessary authenticated users, implement strict file type validation and content inspection on uploads, and sanitize/rename uploaded files before storage to prevent direct execution.
- 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-2024-53303 — 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-2024-53303 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
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