CVE-2021-39426: Seacms

Critical severity, CVSS 9.8. EPSS: 0.9% chance of exploitation in the next 30 days.

An issue was discovered in /Upload/admin/admin_notify.php in Seacms 11.4 allows attackers to execute arbitrary php code via the notify1 parameter when the action parameter equals set.

Affected products

• Seacms Seacms: version 11.4 only

Published 2022-12-15. Last modified 2026-06-17.