CVE-2020-21861

Name: CVE-2020-21861
Creator: NVD / NIST
Published: 2023-07-06T14:15:10.02+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 8.8/10EPSS 0.59%

Last modified Jun 17, 2026

CVE-2020-21861 is a high-severity vulnerability rated 8.8/10 on the CVSS scale. File upload vulnerability in DuxCMS 2.1 allows attackers to execute arbitrary php code via duxcms/AdminUpload/upload.. EPSS estimates a 0.59% chance of exploitation in the next 30 days.

Description

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

Metrics

CVSS 3.1

8.8/10

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

EPSS Probability

0.59%

43.7th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-434

Affected Software

Vendor	Product	Versions
Duxcms Project	Duxcms	2.1

References

https://gitee.com/annyshow/DuxCMS2.1/issues/I182Y4Exploit, Issue Tracking, Third Party Advisory
https://gitee.com/annyshow/DuxCMS2.1/issues/I182Y4Exploit, Issue Tracking, Third Party Advisory

Timeline

Published: Jul 6, 2023
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2020-21861?

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

How severe is CVE-2020-21861?

CVE-2020-21861 has a CVSS score of 8.8/10 (HIGH severity). The EPSS model estimates a 0.59% probability of exploitation in the next 30 days.

How do I fix CVE-2020-21861?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2020-21861?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST