Document Title: =============== Jease CMS v2.11 - Persistent UI Web Vulnerability References (Source): ==================== http://www.vulnerability-lab.com/get_content.php?id=1373 Release Date: ============= 2014-12-12 Vulnerability Laboratory ID (VL-ID): ==================================== 1373 Common Vulnerability Scoring System: ==================================== 3.7 Product & Service Introduction: =============================== Jease is an Open Source Content-Management-System which is driven by the power of Java. Jease means `Java with Ease`, so Jease promises to keep simple things simple and the hard things (j)easy. Content-Management with Jease. Jease is built on top of the most advanced open-source technologies existing in the Java-community. Jease glues these technologies together to provide an outstanding productive development experience by combining the safety and ide-/compiler-support of Java with the turn-around-times of scripting languages. (Copy of the Vendor Homepage: http://www.jease.org/ ) Abstract Advisory Information: ============================== The independent Vulnerability Laboratory Researcher (Manideep K.) discovered a persistent input validation web vulnerability in the Jease 2.11 CMS. Vulnerability Disclosure Timeline: ================================== 2014-12-12: Public Disclosure (Vulnerability Laboratory) Discovery Status: ================= Published Affected Product(s): ==================== Jease Product: Jease - Content Management System 2.11 Exploitation Technique: ======================= Remote Severity Level: =============== Medium Technical Details & Description: ================================ An application-side input validation web vulnerability has been discovered in the official Jease v2.11 Content Management System. The vulnerability allows an attacker to inject own script code as payload to the application-side of the vulnerable service function. The vulnerability is located in the content values of the create function. Local attackers with low privileged application user accounts are able to manipulate the content input values by usage of the create functions. The execution of the persistent script code occurs in the view browser module of the content management system. The attack vector is persistent on the application-side and the request method to inject is POST. The issue allows to transfer persistent malicious script codes to the frontend service. The security risk of the application-side web vulnerability is estimated as medium with a cvss (common vulnerability scoring system) count of 3.7. Exploitation of the application-side web vulnerability requires a low privileged web-application user account and low user interaction. Successful exploitation of the vulnerability results in persistent phishing mails, session hijacking, persistent external redirect to malicious sources and application-side manipulation of affected or connected module context. Request Method(s): [+] POST Vulnerable Module(s): [+] Create Vulnerable Parameter(s): [+] content Affected Module(s): [+] View - Browser Service Proof of Concept (PoC): ======================= The persistent input validation web vulnerability can be exploited by remote attackers without privileged application user account and with low user interaction. For security demonstration or to reproduce the security vulnerability follow the provided information and steps below to continue. Manual steps to reproduce: 1. Install the Content Management System 2. Open online service to interact (link - http://jease.127.0.0.1:8080/login?file&auth 3. Click to include on any entry (Alternatively, you can create one and reproduce) and enter the following parameters in the Content section Note: (Select the plaintext option present at the end of the content box) 4. Enter ? <script>alert(document.cookie)</script> ? or ? <script>alert(document.cookie)</script> ? in the box and press view in browser option Note: the request got saved and is now persistent included to the browser module service 5. Successful reproduce of the vulnerability! Security Risk: ============== The security risk of the persistent input validation web vulnerability in the Jease CMS is estimated as medium. (CVSS 3.7) Credits & Authors: ================== Manideep K. - Information Security Researcher [https://in.linkedin.com/in/manideepk] Disclaimer & Information: ========================= The information provided in this advisory is provided as it is without any warranty. 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