What is CVE-2022-40886?

CVE-2022-40886 is a high-severity vulnerability in Dedecms, classified under Unrestricted Upload of File with Dangerous Type. CVSS score: 7.2/10. Published 2022-10-03.

How severe is CVE-2022-40886?

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

Is CVE-2022-40886 known to be exploited?

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

Arbitrary file upload in Dedecms

CVE-2022-40886

DedeCMS 5.7.98 has a file upload vulnerability in the background.

Vulnerability class: Unrestricted File Upload

Published 2022-10-03 · 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: 0.012 (67.4th percentile), scored 2026-10-05.

Low probability of exploitation in the next 30 days, but still tracked. 67th percentile — 67.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.011 · newest: 0.012 · change: +0.001

Affected products

Dedecms — versions 5.7.98

Weakness classification (CWE)

CWE-434 — Unrestricted Upload of File with Dangerous Type

Public proof-of-concept exploits

References

github.com/Ephemeral1y/Vulnerability/blob/master/DedeCMS/5.7.98/DedeCMS-v5.7.98… (Exploit, Third Party Advisory)

Frequently asked questions

What is CVE-2022-40886?: CVE-2022-40886 is a high-severity vulnerability in Dedecms, classified under Unrestricted Upload of File with Dangerous Type. CVSS score: 7.2/10. Published 2022-10-03.
How severe is CVE-2022-40886?: High severity. CVSS v3 base score is 7.2 out of 10.
Is CVE-2022-40886 known to be exploited?: 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.