CVE-2020-12670: Webmin

Medium severity, CVSS 6.1. EPSS: 0.7% chance of exploitation in the next 30 days.

XSS exists in Webmin 1.941 and earlier affecting the Save function of the Read User Email Module / mailboxes Endpoint when attempting to save HTML emails. This module parses any output without sanitizing SCRIPT elements, as opposed to the View function, which sanitizes the input correctly. A malicious user can send any JavaScript payload into the message body and execute it if the user decides to save that email.

Affected products

• Webmin Webmin: up to and including 1.941

Published 2020-10-12. Last modified 2026-06-17.