CVE-2019-8147 in Magento
Summary
by MITRE
A stored cross-site scripting (XSS) vulnerability exists in Magento 2.2 prior to 2.2.10, Magento 2.3 prior to 2.3.3 or 2.3.2-p1. An authenticated user can inject arbitrary JavaScript code via customer attribute label.
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Analysis
by VulDB Data Team • 02/04/2024
This vulnerability represents a critical stored cross-site scripting flaw in Magento e-commerce platforms that affects versions prior to specific patch releases. The issue stems from inadequate input validation and sanitization mechanisms within the customer attribute management system where authenticated users can inject malicious JavaScript code through customer attribute labels. The vulnerability operates as a stored XSS attack because the injected code persists in the application's database and executes whenever the affected page is loaded by other users, making it particularly dangerous for widespread impact.
The technical implementation of this vulnerability occurs within the Magento 2.2.x and 2.3.x framework where customer attribute labels are not properly sanitized before being rendered in web pages. When an authenticated user with appropriate privileges creates or modifies customer attributes, they can embed malicious JavaScript payloads within the label field. These payloads are then stored in the database and executed in the context of other users' browsers when the customer attribute data is displayed. This flaw aligns with CWE-79 which defines improper neutralization of input during web page generation, specifically in the context of stored cross-site scripting attacks.
The operational impact of CVE-2019-8147 extends beyond simple code execution as it enables attackers to perform various malicious activities including session hijacking, credential theft, data exfiltration, and manipulation of customer information. An attacker with access to customer attribute management functionality can craft payloads that steal cookies, redirect users to malicious sites, or inject additional malware into the application environment. The vulnerability is particularly concerning because it requires minimal privileges to exploit and can affect any user who views pages containing the compromised attribute data, potentially compromising multiple customer accounts and sensitive business information.
Organizations should implement immediate mitigations including applying the vendor patches for Magento 2.2.10, 2.3.3, and 2.3.2-p1 releases which contain proper input sanitization measures. Network segmentation and privileged access controls should be enforced to limit who can modify customer attributes. Additional protective measures include implementing content security policies that restrict script execution, regular security scanning of customer attribute data, and monitoring for suspicious attribute modifications. This vulnerability demonstrates the importance of proper input validation and output encoding as outlined in the OWASP Top Ten and aligns with ATT&CK technique T1059.007 for command and scripting interpreter. The attack surface is expanded when considering that customer attribute modifications can occur through various administrative interfaces, making comprehensive monitoring and access control essential for effective defense.