GHSA-7PGQ-CR25-XVC8 Grav: Incomplete callable validation in blueprint dynamic fields allows arbitrary static method invocation and file disclosure

Summary Grav CMS's blueprint dynamic-field callable guard can be bypassed with a fully-qualified Class::method string, letting an account with only page-editing rights admin.pages, not super-admin plant a directive in a page's form-field frontmatter that invokes an arbitrary public static PHP...