CVE-2021-36440: Showdoc

Critical severity, CVSS 9.8. EPSS: 4.8% chance of exploitation in the next 30 days.

Unrestricted File Upload in ShowDoc v2.9.5 allows remote attackers to execute arbitrary code via the 'file_url' parameter in the component AdminUpdateController.class.php'.

Affected products

• Showdoc Showdoc: version 2.9.5 only

Published 2021-09-08. Last modified 2026-06-17.