CVE-2024-33999: Moodle

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

The referrer URL used by MFA required additional sanitizing, rather than being used directly.

Affected products

• Moodle Moodle: from 4.3.0, before 4.3.4 (fixed in 4.3.4)

Published 2024-05-31. Last modified 2026-06-17.