CVE-2025-48336: Thimpress Course Builder

Critical severity, CVSS 9.8. EPSS: 0.5% chance of exploitation in the next 30 days.

Deserialization of Untrusted Data vulnerability in ThimPress Course Builder course-builder allows Object Injection.This issue affects Course Builder: from n/a through < 3.6.6.

Affected products

• Thimpress Course Builder: up to and including 3.6.6

Published 2025-05-29. Last modified 2026-06-17.