CVE-2020-21434: Maccms

Medium severity, CVSS 5.4. EPSS: 0.5% chance of exploitation in the next 30 days.

Maccms 10 contains a cross-site scripting (XSS) vulnerability in the Editing function under the Member module. This vulnerability is exploited via a crafted payload in the nickname text field.

Affected products

• Maccms Maccms: version 10.0 only

Published 2021-10-04. Last modified 2026-06-17.