CVE-2021-47753
CriticalSummary
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.
Risk Assessment
The vulnerability allows remote code execution without authentication, potentially leading to full system compromise.
Recommendation
Update the CMS to the latest version and implement strict validation of file types and contents.
Original NVD description (English source)
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.