Language: PHP
Label: vulnerable
CWE: CWE-79 \u2014 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.

Code:
            new Behavior\Handler\ClosureHandler(
                static function (NodeInterface $node, ?DOMNode $domNode) {
                    return $domNode !== null ? new DOMText(trim($domNode->nodeValue)) : null;
                }