CVE-2021-23837: Flatcore

Medium severity, CVSS 6.5. EPSS: 1.5% chance of exploitation in the next 30 days.

An issue was discovered in flatCore before 2.0.0 build 139. A time-based blind SQL injection was identified in the selected_folder HTTP request body parameter for the acp interface. The affected parameter (which retrieves the file contents of the specified folder) was found to be accepting malicious user input without proper sanitization, thus leading to SQL injection. Database related information can be successfully retrieved.

Affected products

• Flatcore Flatcore: up to and including 2.0.0

Published 2021-01-15. Last modified 2026-06-17.