CVE-2019-8288 in Online Store
Summary
by MITRE
Vulnerability in Online Store v1.0, Stored XSS in user_view.php where adidas_member_user variable is not sanitized.
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Analysis
by VulDB Data Team • 09/18/2020
The vulnerability identified as CVE-2019-8288 represents a critical stored cross-site scripting flaw within the Online Store v1.0 application, specifically manifesting in the user_view.php script. This security weakness arises from inadequate input validation and sanitization practices where the adidas_member_user variable fails to undergo proper security filtering before being processed and displayed within the application's user interface. The vulnerability exists in the context of web application security where user-supplied data is directly incorporated into dynamic web content without appropriate sanitization measures.
The technical exploitation of this vulnerability occurs when an attacker crafts malicious input containing XSS payloads and submits it through the adidas_member_user parameter. When the application processes this input and displays it in the user_view.php page, the malicious script executes within the context of other users' browsers who view the affected content. This stored nature of the vulnerability means that the malicious code persists in the application's database and affects multiple users over time rather than requiring continuous exploitation for each victim. The flaw directly maps to CWE-79 which defines Cross-Site Scripting as a weakness where untrusted data is incorporated into web pages without proper validation or encoding.
The operational impact of CVE-2019-8288 extends beyond simple data theft or defacement, as it provides attackers with the capability to execute arbitrary code within user sessions. This could enable session hijacking, credential theft, redirection to malicious sites, or the execution of further attacks through the compromised user's browser context. The vulnerability affects the integrity and confidentiality of the web application, potentially allowing attackers to escalate privileges or access sensitive user information. Attackers leveraging this vulnerability can exploit the stored XSS to perform actions such as stealing session cookies, modifying user data, or redirecting users to phishing sites that can harvest additional credentials.
Security mitigations for this vulnerability should focus on implementing comprehensive input validation and output encoding mechanisms throughout the application's data flow. The primary defense involves sanitizing all user-supplied input through proper encoding before storing or displaying it in web pages, particularly addressing the specific adidas_member_user parameter in user_view.php. Implementing Content Security Policy headers, using proper HTML escaping for dynamic content, and conducting regular security code reviews can significantly reduce the risk of similar vulnerabilities. Organizations should also consider implementing Web Application Firewalls and employing automated security testing tools that can identify stored XSS vulnerabilities during development and deployment phases. This remediation approach aligns with ATT&CK technique T1566.001 which involves the exploitation of web application vulnerabilities to establish initial access through malicious input handling.