CVE-2021-47753: Phpkf CMS

Critical severity, CVSS 9.8. EPSS: 0.8% chance of exploitation in the next 30 days.

phpKF CMS 3.00 Beta y6 contains an unauthenticated file upload vulnerability that allows remote attackers to execute arbitrary code by bypassing file extension checks. Attackers can upload a PHP file disguised as a PNG, rename it, and execute system commands through a crafted web shell parameter.

Affected products

• Phpkf CMS: version 3.00 only

Published 2026-01-15. Last modified 2026-06-17.