CVE-2021-22849: Hyweb Hycms-j1

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

Hyweb HyCMS-J1 backend editing function does not filter special characters. Users after log-in can inject JavaScript syntax to perform a stored XSS (Stored Cross-site scripting) attack.

Affected products

• Hyweb Hycms-j1: up to and including 7.4.3

Published 2021-01-22. Last modified 2026-06-17.