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:
        foreach ($attachmentList as $attachment) {
            $html .= sprintf(
                '<li><i class="fa fa-%s" aria-hidden="true"></i> <a href="%s">%s</a></li>',
                $this->mapMimeTypeToIcon($attachment->getMimeType()),
                $attachment->buildUrl(),
                $attachment->getFilename()
            );
        }