[HIGH] Possibility to load a template outside a configured directory when using the filesystem loader

PKSA-n7sg-8f52-pqtf CVE-2022-39261 GHSA-52m2-vc4m-jj33

Affected version: >=1.0.0,<1.44.7|>=2.0.0,<2.15.3|>=3.0.0,<3.4.3

Reported by:
GitHub, FriendsOfPHP/security-advisories