CVE-2021-36581: Kooboo CMS

Critical severity, CVSS 9.8. EPSS: 1.4% chance of exploitation in the next 30 days.

Kooboo CMS 2.1.1.0 is vulnerable to Insecure file upload. It is possible to upload any file extension to the server. The server does not verify the extension of the file and the tester was able to upload an aspx to the server.

Affected products

• Kooboo Kooboo CMS: version 2.1.1.0 only

Published 2021-09-14. Last modified 2026-07-09.