CVE-2020-12255: rConfig

High severity, CVSS 8.8. EPSS: 52.6% chance of exploitation in the next 30 days.

rConfig 3.9.4 is vulnerable to remote code execution due to improper validation in the file upload functionality. vendor.crud.php accepts a file upload by checking content-type without considering the file extension and header. Thus, an attacker can exploit this by uploading a .php file to vendor.php that contains arbitrary PHP code and changing the content-type to image/gif.

Affected products

• rConfig rConfig: version 3.9.4 only

Published 2020-05-18. Last modified 2026-06-17.