Grav: Single invalid UTF-8 byte disables every rule in Security::detectXss(), bypassing the page-content XSS safety gate

Vulnerability Details Component: getgrav/grav core File: system/src/Grav/Common/Security.php Function: detectXss all six entries in the $patterns array use the PCRE u modifier, invoked from Grav\Common\Data\Validation::checkSafety the save-time XSS gate for any non-security.xsswhitelist account's...