What is CVE-2023-51421?

CVE-2023-51421 is a critical-severity vulnerability in Soft8soft Verge3d, classified under Unrestricted Upload of File with Dangerous Type. CVSS score: 9.9/10. Published 2023-12-29.

How severe is CVE-2023-51421?

Critical severity. CVSS v3 base score is 9.9 out of 10.

Is CVE-2023-51421 known to be exploited?

2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Arbitrary file upload in Soft8soft Verge3d

CVE-2023-51421

Unrestricted Upload of File with Dangerous Type vulnerability in Soft8Soft LLC Verge3D Publishing and E-Commerce.This issue affects Verge3D Publishing and E-Commerce: from n/a through 4.5.2.

Vulnerability class: Unrestricted File Upload

Published 2023-12-29 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 9.9 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.006 (46.5th percentile), scored 2026-10-03.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 46th percentile — 46.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.006 · newest: 0.006 · change: 0.000

Affected products

Weakness classification (CWE)

CWE-434 — Unrestricted Upload of File with Dangerous Type

Public proof-of-concept exploits

References

patchstack.com/database/vulnerability/verge3d/wordpress-verge3d-plugin-4-5-2-ar… (Third Party Advisory, vdb-entry)

Frequently asked questions

What is CVE-2023-51421?: CVE-2023-51421 is a critical-severity vulnerability in Soft8soft Verge3d, classified under Unrestricted Upload of File with Dangerous Type. CVSS score: 9.9/10. Published 2023-12-29.
How severe is CVE-2023-51421?: Critical severity. CVSS v3 base score is 9.9 out of 10.
Is CVE-2023-51421 known to be exploited?: 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.