[HIGH] Access to restricted PHP code by dynamic static class access

PKSA-31hv-m6rg-8ryk CVE-2021-21408 GHSA-4h9c-v5vg-5m6m

Affected package: smarty/smarty

Affected version: <3.1.43|>=4.0.0,<4.0.3

Reported by:
GitHub, FriendsOfPHP/security-advisories