Grav CMS versions 2.0.7 through 2.0.10 fail to validate fully-qualified static method calls (Class::method) in blueprint dynamic-field directives because Blueprint::isSafeDynamicCall() only applies its dangerous-callable denylist to strings that do not contain '::'. An account with only page-editing rights (admin.pages, not super-admin or admin.pages_twig) can plant a directive in a page's form-field frontmatter that invokes an arbitrary public static PHP method with attacker-controlled arguments. Using built-in gadget methods this allows reading of any server-readable file (disclosed to anonymous visitors of the crafted page) and arbitrary creation/copying of files and directories under the web-server account. Fixed in 2.0.11.

Affected: Packagist: getgrav/grav

### 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 method with attacker-controlled arguments. Using built-in gadget methods this yields, at minimum, arbitrary reading of any server-readable file (disclosed to anonymous visitors of the crafted page) and arbitrary creation/copying of files and directories under the web-server account.

### Details `Blueprint::isSafeDynamicCall()` (`system/src/Grav/Common/Data/Blueprint.php`, method around line 488) is meant to block dangerous callables named in a blueprint's dynamic-field directives (`data-*@`). It only consults its dangerous-name denylist when the callable string does **not** contain `::`: ```php if (is_string($function) && !str_contains($function, '::') && Utils::isDangerousFunction($function)) { return false; } ``` Any callable string containing `::` — i.e. every `Class::method` static call — skips the check entirely and is passed to `call_user_func_array()` at `Blueprint::dynamicData()` (`Blueprint.php`, around line 461) and `FlexDirectory::dynamicDataField()` (`system/src/Grav/Framework/Flex/FlexDirectory.php`, around line 937). There is no allowlist restricting which classes or methods may be invoked this way; only the call's *arguments* are (separately) scanned for sm…