CVE-2017-15374 in Shopware
Summary
by MITRE
Shopware v5.2.5 - v5.3 is vulnerable to cross site scripting in the customer and order section of the content management system backend modules. Remote attackers are able to inject malicious script code into the firstname, lastname, or order input fields to provoke persistent execution in the customer and orders section of the backend. The execution occurs in the administrator backend listing when processing a preview of the customers (kunden) or orders (bestellungen). The injection can be performed interactively via user registration or by manipulation of the order information inputs. The issue can be exploited by low privileged user accounts against higher privileged (admin or moderator) accounts.
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Analysis
by VulDB Data Team • 11/23/2024
CVE-2017-15374 represents a critical cross site scripting vulnerability affecting Shopware versions 5.2.5 through 5.3, specifically targeting the customer and order management sections of the backend content management system. This vulnerability resides in the sanitization of user input fields including firstname, lastname, and order information, creating a persistent XSS attack vector that can be exploited by malicious actors to execute arbitrary scripts within the administrator backend context. The flaw manifests when administrators view customer or order listings in the backend, as the system fails to properly sanitize or escape user-supplied data during preview rendering, allowing attackers to inject malicious JavaScript code that executes in the context of the administrator's browser session.
The technical exploitation of this vulnerability follows a specific attack pattern that aligns with CWE-79 - Improper Neutralization of Input During Web Page Generation into a Web Browser, which is a fundamental web application security weakness. Attackers can leverage this vulnerability through interactive user registration processes or by manipulating order information inputs, creating a persistent threat that remains active until the affected data is removed from the system. The vulnerability's impact is particularly concerning as it allows low privileged user accounts to target higher privileged administrator or moderator accounts, creating a privilege escalation scenario that violates the principle of least privilege and demonstrates a significant security flaw in the application's access control mechanisms.
The operational impact of this vulnerability extends beyond simple script execution, as it creates a persistent backdoor for attackers to maintain access to the system and potentially escalate their privileges further. When administrators view customer or order listings, the malicious code executes in their browser context, potentially allowing attackers to steal session cookies, modify administrative settings, or even gain complete system control. This vulnerability directly maps to attack techniques described in the MITRE ATT&CK framework under T1059 - Command and Scripting Interpreter and T1566 - Phishing, as it enables attackers to establish persistent access through social engineering or automated injection methods. The backend exposure means that successful exploitation can compromise the entire administrative interface, potentially allowing attackers to modify customer data, manipulate order processing, or even delete critical system information.
Mitigation strategies for this vulnerability should focus on implementing comprehensive input validation and output encoding mechanisms throughout the Shopware application. Organizations should immediately upgrade to patched versions of Shopware 5.3 or later, as the vulnerability was addressed through proper sanitization of user input fields and enhanced HTML escaping in the backend rendering processes. Additionally, implementing Content Security Policy headers, regular security code reviews, and input validation libraries can provide defense in depth against similar vulnerabilities. The remediation process should include thorough testing of all user input fields in backend modules, particularly those that display user-supplied data in administrative contexts, ensuring that all data is properly escaped or sanitized before being rendered in HTML output. Security teams should also consider implementing web application firewalls with XSS detection capabilities and regular vulnerability scanning to identify potential similar weaknesses in other application components.