CVE-2023-51421Network attack vector

Authenticated arbitrary file upload via missing type validation

Published Dec 29, 2023 · Updated Apr 28, 2026

Unrestricted upload in Soft8Soft Verge3D Publishing and E-Commerce 4.5.2 and earlier allows remote authenticated users to write server files. The v3d_upload_app_file function stores uploaded content without validating its file type. Subscriber-level access reaches the handler, allowing server-executable files to be planted for subsequent processing by the web server.

CVSS severity9.9
Critical
EPSS probability0.59%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Unrestricted upload in Soft8Soft Verge3D Publishing and E-Commerce 4.5.2 and earlier allows remote authenticated users to write server files. The v3d_upload_app_file function stores uploaded content without validating its file type. Subscriber-level access reaches the handler, allowing server-executable files to be planted for subsequent processing by the web server.

The record

CVE
CVE-2023-51421
Published
Dec 29, 2023
Updated
Apr 28, 2026
Vendor
Soft8Soft
Product
Verge3D Publishing and E-Commerce
Classifications
CWE-434, T1105
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Dec 29, 2023CVE publishedPublication date reported by the CVE source.
  2. Apr 28, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=n/a <=4.5.2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Soft8Soft · Verge3D Publishing and E-Commerceversion=n/a <=4.5.2

Published CVSS scores

8.8WordfenceCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
9.9PatchstackCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
8.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-434Unrestricted Upload of File with Dangerous Type
T1105Ingress Tool Transfer

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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