Document Title: =============== e107 v2 Bootstrap CMS - CSRF Web Vulnerability References (Source): ==================== https://www.vulnerability-lab.com/get_content.php?id=2083 Release Date: ============= 2017-07-05 Vulnerability Laboratory ID (VL-ID): ==================================== 2083 Common Vulnerability Scoring System: ==================================== 3.2 Vulnerability Class: ==================== Cross Site Request Forgery Current Estimated Price: ======================== 500€ - 1.000€ Product & Service Introduction: =============================== Powerful Website Content Management System Designed for Bootstrap v3. Get started and make e107 the engine of your fully-featured site today! (Copy of the Vendors Page: http://e107.org/ ) Abstract Advisory Information: ============================== An independent vulnerability laboratory researcher discovered a client-side cross site request forgery vulnerability in the official e107 v2 Bootstrap CMS. Vulnerability Disclosure Timeline: ================================== 2017-06-19: Researcher Notification & Coordination (Security Researcher) 2017-06-19: Vendor Notification (Security Department) 2017-07-06: Public Disclosure (Vulnerability Laboratory) Discovery Status: ================= Published Affected Product(s): ==================== e107 Product: e107 Bootstrap - Content Management System 2.x Exploitation Technique: ======================= Remote Severity Level: =============== Low Technical Details & Description: ================================ A cross site request forgery web vulnerability has been discovered in the official e107 v2 Bootstrap CMS content management system. The issue allows remote attackers to manipulate client-side browser to web-application requests, to execute service functions via non-expired session credentials. The cross site request forgery vulnerabilites are located in multiple admin cms module POST method requests. In the absence of a security token an attacker can execute arbitrary codes against administrator accounts to permanenly delete the pages of the website via panel. Due to the infrastructure the issue becomes more critical without a checkbox to confirm the delete of any page via panel module. The security risk of the csrf vulnerability is estimated as medium with a cvss (common vulnerability scoring system) count of 3.2. Exploitation of the client-side vulnerability requires no privileged web-application user account and only low user interaction. Proof of Concept (PoC): ======================= PoC Codes: (no anti-CSRF token has been used) 1. To Change user details/privileges (where user's id is 2) 2. Add/modify news (where news's id is 5) Solution - Fix & Patch: ======================= The vulnerability can be patched by checking and filtering the input values from the vulnerable module. Dont forget to fix the output aswell (htmlspecialchars for example). Security Risk: ============== The security risk of the cross site scripting vulnerability in the wordpress newletter plugin is estimated as medium (CVSS 3.2). Credits & Authors: ================== NirmalThapa [twitter.com/nirmal_4n_] - https://www.vulnerability-lab.com/show.php?user=NirmalThapa 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 Labs or its suppliers have been advised of the possibility of such damages. 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