[CRITICAL] Sendmail transport arbitrary shell execution

PKSA-5pys-kfdn-kcby GHSA-4qpj-gxxg-jqg4

Affected package: swiftmailer/swiftmailer

Affected version: >=4.0.0,<4.99.99|>=5.0.0,<5.2.1

Reported by:
GitHub, FriendsOfPHP/security-advisories