CVE-2026-52307
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 Sep 8, 2026
- CVSS 5.4 medium
- 0.3% chance of exploitation in the next 30 days (EPSS)