CVE-2021-47940
CriticalCVSS 9.8Exploitation Probability (EPSS)
Low risk32th percentile - higher than 32% of all known CVEs
Summary
WordPress Plugin Download From Files version 1.48 and earlier has an arbitrary file upload vulnerability. Unauthenticated attackers can upload malicious files by manipulating the allowExt parameter in the AJAX action.
Risk Assessment
Attackers can upload a PHP shell to the WordPress root, gaining remote code execution and full site control.
Recommendation
Update the Download From Files plugin to the latest version. If not in use, remove it.
Original NVD description (English source)
WordPress Plugin Download From Files version 1.48 and earlier contains an arbitrary file upload vulnerability that allows unauthenticated attackers to upload malicious files by exploiting the AJAX fileupload action. Attackers can send POST requests to the admin-ajax.php endpoint with the download_from_files_617_fileupload action, manipulating the allowExt parameter to bypass file type restrictions and upload executable files like PHP shells to the web root.