What is CVE-2020-21861?

CVE-2020-21861 is a high-severity vulnerability in Duxcms Project, classified under Unrestricted Upload of File with Dangerous Type. CVSS score: 8.8/10. Published 2023-07-06.

How severe is CVE-2020-21861?

High severity. CVSS v3 base score is 8.8 out of 10.

Arbitrary file upload in Duxcms Project

CVE-2020-21861

File upload vulnerability in DuxCMS 2.1 allows attackers to execute arbitrary php code via duxcms/AdminUpload/upload.

Vulnerability class: Unrestricted File Upload

Published 2023-07-06 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.007 (51.8th percentile), scored 2026-10-01.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 52nd percentile — 51.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.007 · newest: 0.007 · change: 0.000

Affected products

Duxcms Project — versions 2.1

Weakness classification (CWE)

CWE-434 — Unrestricted Upload of File with Dangerous Type

References

gitee.com/annyshow/DuxCMS2.1/issues/I182Y4 (Exploit, Third Party Advisory, Issue Tracking)

Frequently asked questions

What is CVE-2020-21861?: CVE-2020-21861 is a high-severity vulnerability in Duxcms Project, classified under Unrestricted Upload of File with Dangerous Type. CVSS score: 8.8/10. Published 2023-07-06.
How severe is CVE-2020-21861?: High severity. CVSS v3 base score is 8.8 out of 10.