Language: PHP
Label: safe
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:
            foreach ($attributes as $name) {
                if (!isset($def->info[$element]->attr[$name])) {
                    return "$element.$name";
                }
            }