What is CVE-2020-21359?

CVE-2020-21359 is a critical-severity vulnerability in Maccms, classified under Unrestricted Upload of File with Dangerous Type. CVSS score: 9.8/10. Published 2021-08-11.

How severe is CVE-2020-21359?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Arbitrary file upload in Maccms

CVE-2020-21359

An arbitrary file upload vulnerability in the Template Upload function of Maccms10 allows attackers bypass the suffix whitelist verification to execute arbitrary code via adding a character to the end of the uploaded file's name.

Vulnerability class: Unrestricted File Upload

EPSS: 0.017 (75.3th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

Affected products

Maccms — versions 10.0
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, Issue Tracking)

Frequently asked questions

What is CVE-2020-21359?: CVE-2020-21359 is a critical-severity vulnerability in Maccms, classified under Unrestricted Upload of File with Dangerous Type. CVSS score: 9.8/10. Published 2021-08-11.
How severe is CVE-2020-21359?: Critical severity. CVSS v3 base score is 9.8 out of 10.