By analyzing the following code, is it possible to check the existing XSS vulnerabilities? If so, indicate where and why, as well as the possible ways of fixing them. This is the code: "<?php
$timeNow = time();
?>
<script src="<?= base_url('assets/ckeditor/ckeditor.js') ?>"></script>
<link rel="stylesheet" href="<?= base_url('assets/bootstrap-select-1.12.1/bootstrap-select.min.css') ?>">
<div class="row">
    <div class="col-md-6 col-md-offset-3">
        <?php
        if ($this->session->flashdata('result_publish')) {
            ?> 
            <div class="alert alert-success"><?= $this->session->flashdata('result_publish') ?></div> 
            <?php
        }
        ?>
        <div class="content">
            <form class="form-box" action="" method="POST" enctype="multipart/form-data">
                <input type="hidden" value="<?= isset($_POST['folder']) ? $_POST['folder'] : $timeNow ?>" name="folder">
                <div class="form-group available-translations">
                    <b>Languages</b>
                    <?php foreach ($languages as $language) { ?>
                        <button type="button" data-locale-change="<?= $language->abbr ?>" class="btn btn-default locale-change text-uppercase <?= $language->abbr == MY_DEFAULT_LANGUAGE_ABBR ? 'active' : '' ?>">
                            <img src="<?= base_url('attachments/lang_flags/' . $language->flag) ?>" alt="">
                            <?= $language->abbr ?>
                        </button>
                    <?php } ?>
                </div>
                <?php
                $i = 0;
                foreach ($languages as $language) {
                    ?>
                    <div class="locale-container locale-container-<?= $language->abbr ?>" <?= $language->abbr == MY_DEFAULT_LANGUAGE_ABBR ? 'style="display:block;"' : '' ?>>
                        <input type="hidden" name="translations[]" value="<?= $language->abbr ?>">
                        <div class="form-group">
                            <img src="<?= base_url('attachments/lang_flags/' . $language->flag) ?>" alt="<?= $language->name ?>" class="language">
                            <input type="text" name="title[]" placeholder="<?= lang('vendor_product_name') ?>" value="<?= $trans_load != null && isset($trans_load[$language->abbr]['title']) ? $trans_load[$language->abbr]['title'] : '' ?>" class="form-control">
                        </div> 
                        <label><?= lang('vendor_product_description') ?> <img src="<?= base_url('attachments/lang_flags/' . $language->flag) ?>" alt="<?= $language->name ?>"></label>
                        <div class="form-group">
                            <textarea class="form-control" name="description[]" id="description<?= $i ?>"><?= $trans_load != null && isset($trans_load[$language->abbr]['description']) ? $trans_load[$language->abbr]['description'] : '' ?></textarea>
                        </div>
                        <script>
                            CKEDITOR.replace('description<?= $i ?>');
                            CKEDITOR.config.entities = false;
                        </script>
                        <div class="form-group">
                            <img src="<?= base_url('attachments/lang_flags/' . $language->flag) ?>" alt="" class="language">
                            <input type="text" name="price[]" value="<?= $trans_load != null && isset($trans_load[$language->abbr]['price']) ? $trans_load[$language->abbr]['price'] : '' ?>" placeholder="<?= lang('vendor_price') ?>" class="form-control">
                        </div>
                        <div class="form-group">
                            <img src="<?= base_url('attachments/lang_flags/' . $language->flag) ?>" alt="" class="language">
                            <input type="text" name="old_price[]" value="<?= $trans_load != null && isset($trans_load[$language->abbr]['price']) ? $trans_load[$language->abbr]['price'] : '' ?>" placeholder="<?= lang('vendor_old_price') ?>" class="form-control">
                        </div>
                    </div>
                    <?php
                    $i++;
                }
                ?>
                <div class="form-group bordered-group">
                    <?php
                    if (isset($_POST['image']) && $_POST['image'] != null) {
                        $image = 'attachments/shop_images/' . $_POST['image'];
                        if (!file_exists($image)) {
                            $image = 'attachments/no-image.png';
                        }
                        ?>
                        <p><?= lang('vendor_current_image') ?></p>
                        <div>
                            <img src="<?= base_url($image) ?>" class="img-responsive img-thumbnail" style="max-width:300px; margin-bottom: 5px;">
                        </div>
                        <input type="hidden" name="old_image" value="<?= $_POST['image'] ?>">
                        <?php if (isset($_GET['to_lang'])) { ?>
                            <input type="hidden" name="image" value="<?= $_POST['image'] ?>">
                            <?php
                        }
                    }
                    ?>
                    <label><?= lang('vendor_cover_image') ?></label>
                    <input type="file" name="userfile">
                </div>
                <div class="form-group bordered-group">
                    <div class="others-images-container">
                        <?= $otherImgs ?>
                    </div>
                    <a href="javascript:void(0);" data-toggle="modal" data-target="#modalMoreImages" class="btn btn-default"><?= lang('vendor_up_more_imgs') ?></a>
                </div>
                <div class="form-group">
                    <label><?= lang('vendor_select_category') ?></label>
                    <select class="selectpicker form-control show-tick show-menu-arrow" name="shop_categorie">
                        <?php foreach ($shop_categories as $key_cat => $shop_categorie) { ?>
                            <option <?= isset($_POST['shop_categorie']) && $_POST['shop_categorie'] == $key_cat ? 'selected=""' : '' ?> value="<?= $key_cat ?>">
                                <?php
                                foreach ($shop_categorie['info'] as $nameAbbr) {
                                    if ($nameAbbr['abbr'] == $this->config->item('language_abbr')) {
                                        echo $nameAbbr['name'];
                                    }
                                }
                                ?>
                            </option>
                        <?php } ?>
                    </select>
                </div> 
                <?php if ($showBrands == 1) { ?>
                    <div class="form-group for-shop">
                        <label>Brand</label>
                        <select class="selectpicker" name="brand_id">
                            <?php foreach ($brands as $brand) { ?>
                                <option <?= isset($_POST['brand_id']) && $_POST['brand_id'] == $brand['id'] ? 'selected' : '' ?> value="<?= $brand['id'] ?>"><?= $brand['name'] ?></option>
                            <?php } ?>
                        </select>
                    </div>
                <?php } ?>
                <div class="form-group">
                    <input type="text" placeholder="<?= lang('vendor_quantity') ?>" name="quantity" value="<?= @$_POST['quantity'] ?>" class="form-control">
                </div>
                <div class="form-group">
                    <input type="text" placeholder="<?= lang('vendor_position') ?>" name="position" value="<?= @$_POST['position'] ?>" class="form-control">
                </div>
                <button type="submit" name="setProduct" class="btn btn-green"><?= lang('vendor_submit_product') ?></button>
            </form> 
        </div>
    </div>
</div>
<!-- Modal Upload More Images -->
<div class="modal fade" id="modalMoreImages" tabindex="-1" role="dialog" aria-labelledby="myModalLabel">
    <div class="modal-dialog" role="document">
        <div class="modal-content">
            <div class="modal-header">
                <button type="button" class="close" data-dismiss="modal" aria-label="Close"><span aria-hidden="true">&times;</span></button>
                <h4 class="modal-title" id="myModalLabel"><?= lang('vendor_up_more_imgs') ?></h4>
            </div>
            <div class="modal-body">
                <form id="uploadImagesForm">
                    <input type="hidden" value="<?= isset($_POST['folder']) ? $_POST['folder'] : $timeNow ?>" name="folder">
                    <label for="others"><?= lang('vendor_select_images') ?></label>
                    <input type="file" name="others[]" id="others" multiple />
                </form>
            </div>
            <div class="modal-footer">
                <button type="button" class="btn btn-default finish-upload">
                    <span class="finish-text"><?= lang('finish') ?></span>
                    <img src="<?= base_url('assets/imgs/load.gif') ?>" class="loadUploadOthers" alt="">
                </button>
            </div>
        </div>
    </div>
</div>
<script src="<?= base_url('assets/bootstrap-select-1.12.1/js/bootstrap-select.min.js') ?>"></script>"