CVE-2024-20719: Adobe Commerce Stored XSS Vulnerability

CVE-2024-20719 Overview

CVE-2024-20719 is a stored Cross-Site Scripting (XSS) vulnerability affecting Adobe Commerce versions 2.4.6-p3, 2.4.5-p5, 2.4.4-p6 and earlier. This vulnerability allows an admin attacker to inject malicious scripts into every admin page within the Adobe Commerce platform. When other administrators browse to pages containing the vulnerable field, the malicious JavaScript executes in their browser context, potentially allowing the attacker to gain unauthorized admin access or perform actions on behalf of the victim.

Critical Impact

This stored XSS vulnerability enables privilege escalation through script injection, potentially compromising all administrative accounts across the Adobe Commerce installation.

Affected Products

• Adobe Commerce 2.4.6-p3 and earlier patch versions (2.4.6, 2.4.6-p1, 2.4.6-p2)
• Adobe Commerce 2.4.5-p5 and earlier patch versions (2.4.5, 2.4.5-p1 through 2.4.5-p4)
• Adobe Commerce 2.4.4-p6 and earlier patch versions (2.4.4, 2.4.4-p1 through 2.4.4-p5)

Discovery Timeline

• 2024-02-15 - CVE-2024-20719 published to NVD
• 2024-11-21 - Last updated in NVD database

Technical Details for CVE-2024-20719

Vulnerability Analysis

This stored XSS vulnerability (CWE-79) affects the Adobe Commerce administrative interface. The vulnerability exists due to improper input sanitization, allowing an attacker with administrative privileges to inject malicious JavaScript code that persists in the application. Unlike reflected XSS attacks, stored XSS payloads are permanently saved in the target application, making them particularly dangerous as they execute whenever any user views the affected page.

The attack can be executed over the network without requiring user interaction once the payload is stored. The scope is changed, meaning the vulnerability in the admin panel can impact resources beyond its security scope, affecting the confidentiality, integrity, and availability of the broader system.

Root Cause

The root cause of CVE-2024-20719 is insufficient input validation and output encoding in the Adobe Commerce admin interface. The application fails to properly sanitize user-supplied input before storing it in the database and does not adequately encode output when rendering content in admin pages. This allows specially crafted JavaScript to bypass security controls and execute in the context of other authenticated admin sessions.

Attack Vector

The attack vector for this vulnerability requires the attacker to first obtain administrative access to the Adobe Commerce platform. Once authenticated, the attacker can inject malicious JavaScript payloads into vulnerable form fields within the admin interface. These payloads are stored persistently and execute whenever other administrators navigate to pages displaying the compromised content.

The malicious scripts could be leveraged to steal session tokens or authentication cookies, create new administrative accounts with attacker-controlled credentials, modify store configurations or payment settings, exfiltrate sensitive customer or business data, or establish persistent backdoor access to the commerce platform.

Detection Methods for CVE-2024-20719

Indicators of Compromise

• Unexpected JavaScript code or <script> tags in admin database fields or stored content
• Suspicious admin account activity including creation of new admin users without authorization
• Unusual network requests originating from admin pages to external domains
• Browser console errors or unexpected script execution during admin panel navigation

Detection Strategies

• Implement Content Security Policy (CSP) headers to detect and block unauthorized script execution
• Monitor admin audit logs for suspicious content modifications or unusual field values
• Deploy Web Application Firewall (WAF) rules to detect XSS payload patterns in form submissions
• Conduct regular security scans of stored content for malicious JavaScript signatures

Monitoring Recommendations

• Enable comprehensive logging for all admin panel form submissions and content changes
• Configure alerts for database modifications containing common XSS patterns (e.g., <script>, javascript:, onerror=)
• Monitor for anomalous admin session behavior including multiple simultaneous sessions or geographic inconsistencies
• Implement real-time security monitoring for outbound connections from admin interface pages

How to Mitigate CVE-2024-20719

Immediate Actions Required

• Update Adobe Commerce to the latest patched versions (2.4.6-p4 or later, 2.4.5-p6 or later, 2.4.4-p7 or later)
• Review admin user accounts and remove any unauthorized or suspicious accounts
• Audit stored content and database fields for signs of injected malicious scripts
• Implement or strengthen Content Security Policy headers to prevent inline script execution

Patch Information

Adobe has released security patches addressing this vulnerability in security bulletin APSB24-03. Organizations should upgrade to the following minimum versions to remediate CVE-2024-20719:

• Adobe Commerce 2.4.6-p4 or later
• Adobe Commerce 2.4.5-p6 or later
• Adobe Commerce 2.4.4-p7 or later

Review the Adobe Security Advisory for complete patch details and upgrade instructions.

Workarounds

• Implement strict Content Security Policy (CSP) headers restricting inline script execution and limiting script sources
• Enable admin session IP validation to prevent session hijacking from stolen tokens
• Restrict admin panel access to trusted IP addresses or VPN connections only
• Conduct regular security audits of admin accounts and enforce multi-factor authentication (MFA) for all admin users

# Example CSP header configuration for Apache (.htaccess)
Header set Content-Security-Policy "default-src 'self'; script-src 'self'; style-src 'self' 'unsafe-inline'; img-src 'self' data:; frame-ancestors 'self';"

# Example CSP header configuration for Nginx
add_header Content-Security-Policy "default-src 'self'; script-src 'self'; style-src 'self' 'unsafe-inline'; img-src 'self' data:; frame-ancestors 'self';";