What is CVE-2023-40784?

CVE-2023-40784 is a critical-severity vulnerability in Dedecms, classified under Unrestricted Upload of File with Dangerous Type. CVSS score: 9.8/10. Published 2023-09-12.

How severe is CVE-2023-40784?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Arbitrary file upload in Dedecms

CVE-2023-40784

DedeCMS 5.7.102 has a File Upload vulnerability via uploads/dede/module_make.php.

Vulnerability class: Unrestricted File Upload

Published 2023-09-12 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.007 (50.5th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 50th percentile — 50.5% 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: 0.007 · change: +0.001

Affected products

Dedecms — versions 5.7.102

Weakness classification (CWE)

CWE-434 — Unrestricted Upload of File with Dangerous Type

References

www.cnblogs.com/SFYHAC/articles/17619123.html (Broken Link)
vulmon.com/vulnerabilitydetails (Third Party Advisory)

Frequently asked questions

What is CVE-2023-40784?: CVE-2023-40784 is a critical-severity vulnerability in Dedecms, classified under Unrestricted Upload of File with Dangerous Type. CVSS score: 9.8/10. Published 2023-09-12.
How severe is CVE-2023-40784?: Critical severity. CVSS v3 base score is 9.8 out of 10.