CVE-2026-75574: Improper Neutralization of Special Elements Used in a Template Engine

The Grav Email plugin getgrav/grav-plugin-email before 4.2.2 renders page-editor-controlled Email action parameters as unsandboxed Twig templates. An authenticated remote user with only api.access and api.pages.write permissions can place a Twig expression in header.form.process.email.body, publi...