CVE-2020-21494: Xiuno Xiunobbs

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

A cross-site scripting (XSS) vulnerability in the component install\install.sql of Xiuno BBS 4.0.4 allows attackers to execute arbitrary web scripts or HTML via changing the doctype value to 0.

Affected products

• Xiuno Xiunobbs: version 4.0.4 only

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