CVE-2024-35777: WooCommerce Injection Vulnerability

CVE-2024-35777 Overview

CVE-2024-35777 is an Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection') vulnerability affecting Automattic's WooCommerce plugin for WordPress. This content injection flaw allows attackers to spoof content within affected WooCommerce installations, potentially misleading users or manipulating displayed information.

Critical Impact

Attackers with high-privileged access can inject malicious content into WooCommerce pages, leading to content spoofing that may deceive end users and damage site integrity.

Affected Products

• WooCommerce versions through 8.9.2
• WordPress sites running vulnerable WooCommerce installations
• E-commerce platforms built on affected WooCommerce versions

Discovery Timeline

• 2024-07-09 - CVE-2024-35777 published to NVD
• 2024-11-21 - Last updated in NVD database

Technical Details for CVE-2024-35777

Vulnerability Analysis

This vulnerability is classified under CWE-74 (Improper Neutralization of Special Elements in Output Used by a Downstream Component). The flaw exists in how WooCommerce processes and renders certain input data, failing to properly neutralize special elements before they are passed to downstream components for output.

The content injection vulnerability requires an authenticated attacker with high privileges (such as an administrator or shop manager role) to exploit. While the attack complexity is low once the attacker has the necessary access, user interaction is required for the vulnerability to be successfully exploited. The impact is limited to minor integrity and availability concerns, with no direct confidentiality impact.

Root Cause

The root cause stems from insufficient input validation and output encoding within WooCommerce's content handling mechanisms. When special elements are not properly neutralized before being rendered in the output, attackers can inject arbitrary content that gets displayed to users. This represents a failure in the application's defense-in-depth approach to handling user-controlled data.

Attack Vector

The attack vector is network-based, requiring the attacker to have authenticated access to a WordPress installation with WooCommerce. The attacker must possess elevated privileges to reach the vulnerable functionality. Once these conditions are met, the attacker can craft specially formatted input that bypasses the existing sanitization controls, resulting in content being injected and displayed to site visitors.

The exploitation typically involves manipulating input fields or parameters that are subsequently rendered without proper encoding, allowing the attacker to control what content appears on the page. This can be used for various malicious purposes including phishing attacks, defacement, or misleading customers with false product information.

Detection Methods for CVE-2024-35777

Indicators of Compromise

• Unexpected or unauthorized content appearing on WooCommerce product pages or checkout flows
• Audit log entries showing unusual content modifications by privileged users
• Customer reports of misleading or suspicious content on the storefront
• Anomalous changes to WooCommerce settings or page content without corresponding administrative actions

Detection Strategies

• Monitor WordPress and WooCommerce audit logs for unusual content modification patterns
• Implement file integrity monitoring to detect unauthorized changes to WooCommerce templates and content
• Deploy web application firewalls (WAF) with rules to detect content injection attempts
• Regularly review user permissions and audit privileged account activities

Monitoring Recommendations

• Enable verbose logging for all administrative actions within WordPress and WooCommerce
• Set up alerts for content changes made outside of normal business hours or workflows
• Implement automated scanning for unexpected HTML or script elements in WooCommerce output
• Conduct periodic manual reviews of high-value pages such as checkout and payment screens

How to Mitigate CVE-2024-35777

Immediate Actions Required

• Update WooCommerce to the latest available version beyond 8.9.2
• Review and audit all privileged user accounts for unauthorized access or suspicious activity
• Implement the principle of least privilege for all WordPress user roles
• Enable two-factor authentication for all administrative accounts

Patch Information

Automattic has addressed this vulnerability in WooCommerce versions released after 8.9.2. Site administrators should update to the latest stable release of WooCommerce through the WordPress plugin update mechanism. For detailed patch information, refer to the Patchstack WooCommerce Vulnerability advisory.

Workarounds

• Restrict administrative access to trusted IP addresses using .htaccess or security plugins
• Temporarily disable or limit functionality of high-privileged accounts until patching is complete
• Implement additional output encoding at the theme level as a defense-in-depth measure
• Deploy a web application firewall with content injection detection rules

# WordPress CLI command to update WooCommerce
wp plugin update woocommerce

# Verify current WooCommerce version
wp plugin get woocommerce --field=version

# List users with administrative capabilities for audit
wp user list --role=administrator --fields=ID,user_login,user_email