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:
    public function setData($data)
    {
        if ($data instanceof ElementInterface) {
            $this->setType(Service::getElementType($data));
            $data = $data->getId();
        }

        $this->data = $data;

        return $this;
    }