CVE-2024-27733
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 · uneditedFile Upload vulnerability in Byzro Network Smart s42 Management Platform v.S42 allows a local attacker to execute arbitrary code via the useratte/userattestation.php component.
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 confidenceA file upload vulnerability in the Byzro Network Smart s42 Management Platform (useratte/userattestation.php component) allows a local attacker to upload malicious files and achieve arbitrary code execution. The high CVSS score (7.7) reflects the severe impact of remote code execution.
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
- Local
- Complexity
- Low
- Privileges
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- High
- Availability
- None
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
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.
-
Confirm Byzro Smart s42 Platform installationSearch the web server for files or directories related to 'Byzro' or 'Smart s42 Management Platform'. Check web server document roots for management portal directories.Affected if The Byzro Network Smart s42 Management Platform is installed on the system
-
Locate the vulnerable upload componentSearch for the file 'userattestation.php' within the web directory, particularly under a 'useratte' path or similar upload handling paths.Affected if The file useratte/userattestation.php exists on the server
-
Verify file upload functionality is accessibleAttempt to access the useratte/userattestation.php endpoint via HTTP/HTTPS request to confirm the component is reachable and not disabled or removed.Affected if The upload endpoint responds and accepts requests (is not removed or access-controlled)
-
Check upload directory web accessibilityInspect the web server configuration to determine where uploaded files are stored. Verify if the upload directory is accessible via the web server (inside webroot).Affected if Uploaded files are stored in a web-accessible directory and can be executed via direct URL access
A system is affected if the Byzro Smart s42 Management Platform is installed with the useratte/userattestation.php component present and the upload directory is web-accessible, allowing uploaded files to be executed.
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-based file type checking, file content verification, randomizing uploaded filenames, storing uploads outside webroot, and disabling script execution in upload directories.
- Consultation3.0 h
- Implementation6.0 h
- Testing4.0 h
- Review / QA2.0 h
An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $4,224.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2024-27733 — 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-2024-27733 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
Be the first to add a field note for this CVE — a mitigation you’ve verified, a version caveat, or a link to a working fix. Sign in above to contribute.
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