CVE-2021-41560: Opencats

Critical severity, CVSS 9.8. EPSS: 11.3% chance of exploitation in the next 30 days.

OpenCATS through 0.9.6 allows remote attackers to execute arbitrary code by uploading an executable file via lib/FileUtility.php.

Affected products

• Opencats Opencats: up to and including 0.9.6

Published 2021-12-15. Last modified 2026-06-17.