What is CVE-2022-40921?

CVE-2022-40921 is a high-severity vulnerability in Dedecms, classified under Unrestricted Upload of File with Dangerous Type. CVSS score: 7.2/10. Published 2022-10-12.

How severe is CVE-2022-40921?

High severity. CVSS v3 base score is 7.2 out of 10.

Arbitrary file upload in Dedecms

CVE-2022-40921

DedeCMS V5.7.99 was discovered to contain an arbitrary file upload vulnerability via the component /dede/file_manage_control.php.

Vulnerability class: Unrestricted File Upload

Published 2022-10-12 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.2 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.010 (60.9th percentile), scored 2026-10-05.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 61st percentile — 60.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.010 · newest: 0.010 · change: +0.000

Affected products

Dedecms — versions 5.7.99

Weakness classification (CWE)

CWE-434 — Unrestricted Upload of File with Dangerous Type

References

github.com/T4nGg/DedeCMS-V5.7.99-File-Upload/ (Exploit, Third Party Advisory)

Frequently asked questions

What is CVE-2022-40921?: CVE-2022-40921 is a high-severity vulnerability in Dedecms, classified under Unrestricted Upload of File with Dangerous Type. CVSS score: 7.2/10. Published 2022-10-12.
How severe is CVE-2022-40921?: High severity. CVSS v3 base score is 7.2 out of 10.