What is CVE-2020-21081?

CVE-2020-21081 is a medium-severity vulnerability in Maccms, classified under Cross-Site Request Forgery (CSRF). CVSS score: 6.5/10. Published 2021-09-14.

How severe is CVE-2020-21081?

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

CSRF in Maccms

CVE-2020-21081

A cross-site request forgery (CSRF) in Maccms 8.0 causes administrators to add and modify articles without their knowledge via clicking on a crafted URL.

Vulnerability class: CSRF (Cross-Site Request Forgery)

Published 2021-09-14 · last modified 2026-06-17.

CVSS v3 metric

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

EPSS exploit prediction

EPSS: 0.004 (33.8th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 34th percentile — 33.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: 0.000

Affected products

Maccms — versions 8.0

Weakness classification (CWE)

CWE-352 — Cross-Site Request Forgery (CSRF)

References

github.com/magicblack/maccms8/issues/2 (Exploit, Third Party Advisory)

Frequently asked questions

What is CVE-2020-21081?: CVE-2020-21081 is a medium-severity vulnerability in Maccms, classified under Cross-Site Request Forgery (CSRF). CVSS score: 6.5/10. Published 2021-09-14.
How severe is CVE-2020-21081?: Medium severity. CVSS v3 base score is 6.5 out of 10.