What is CVE-2020-21005?

CVE-2020-21005 is a medium-severity vulnerability in Wellcms, classified under Unrestricted Upload of File with Dangerous Type. CVSS score: 6.5/10. Published 2021-06-03.

How severe is CVE-2020-21005?

Medium severity. CVSS v3 base score is 6.5 out of 10.

Arbitrary file upload in Wellcms

CVE-2020-21005

WellCMS 2.0 beta3 is vulnerable to File Upload. A user can log in to the CMS background and upload a picture. Because the upload file type is controllable, the user can modify the upload file type to get webshell.

Vulnerability class: Unrestricted File Upload

EPSS: 0.008 (53.2th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N.

Affected products

Wellcms — versions 2.0
N/a — versions n/a

Weakness classification (CWE)

CWE-434 — Unrestricted Upload of File with Dangerous Type

References

cve@mitre.org (Exploit, Third Party Advisory, x_refsource_MISC)
cve@mitre.org (x_refsource_MISC, Vendor Advisory)

Frequently asked questions

What is CVE-2020-21005?: CVE-2020-21005 is a medium-severity vulnerability in Wellcms, classified under Unrestricted Upload of File with Dangerous Type. CVSS score: 6.5/10. Published 2021-06-03.
How severe is CVE-2020-21005?: Medium severity. CVSS v3 base score is 6.5 out of 10.