CVE-2026-52307

Medium severity, CVSS 5.4. EPSS: 0.3% chance of exploitation in the next 30 days.

An authenticated stored cross-site scripting (XSS) vulnerability in the Column Management component of ClassCMS 1CMS v5.6 allows attackers to execute arbitrary web scripts or HTML via injecting a crafted payload into the title field.

Published 2026-09-08. Last modified 2026-09-14.