CVE-2024-53742: WooCommerce Referral Plugin XSS Flaw

CVE-2024-53742 Overview

CVE-2024-53742 is a Reflected Cross-Site Scripting (XSS) vulnerability in the Prism I.T. Systems Multilevel Referral Affiliate Plugin for WooCommerce. The flaw affects all plugin versions up to and including 2.27. Attackers can craft malicious URLs containing JavaScript payloads that execute in the victim's browser when the link is followed. The vulnerability is tracked under CWE-79 for improper neutralization of input during web page generation. Exploitation requires user interaction but no authentication, and the scope change indicates the payload can affect resources beyond the vulnerable component.

Critical Impact
Successful exploitation enables session hijacking, credential theft, and arbitrary actions performed in the context of authenticated WordPress users including administrators.

Affected Products

Prism I.T. Systems Multilevel Referral Affiliate Plugin for WooCommerce versions n/a through 2.27
WordPress sites running the multilevel-referral-plugin-for-woocommerce plugin
WooCommerce storefronts with the affiliate plugin enabled

Discovery Timeline

2024-12-01 - CVE-2024-53742 published to NVD
2026-06-17 - Last updated in NVD database

Technical Details for CVE-2024-53742

Vulnerability Analysis

The vulnerability stems from improper neutralization of user-supplied input during web page generation. The plugin reflects request parameters into HTTP responses without proper output encoding or sanitization. Attackers embed JavaScript payloads in URL parameters processed by the plugin's request handlers. When a victim clicks a crafted link, the browser renders the injected script within the trusted site's origin. The scope change reflected in the CVSS vector indicates the injected code can interact with resources outside the vulnerable plugin's security context, including the broader WordPress administrative interface.

Root Cause

The root cause is missing input sanitization and output encoding within the plugin's request processing logic. User input flowing into HTML response contexts is not escaped using WordPress functions such as esc_html(), esc_attr(), or wp_kses(). This allows raw HTML and JavaScript to be rendered by the browser.

Attack Vector

Attackers deliver the exploit through phishing emails, social media links, or malicious advertisements containing crafted URLs. The target must click the link while authenticated to the WordPress site for maximum impact. Administrative users represent the highest-value targets because their sessions enable plugin modifications, user creation, and content manipulation. The vulnerability requires no privileges to exploit and operates entirely over the network.

For technical specifics, refer to the Patchstack WordPress Vulnerability Report.

Detection Methods for CVE-2024-53742

Indicators of Compromise

HTTP requests to plugin endpoints containing URL-encoded <script>, javascript:, or onerror= payloads in query parameters
Web server access logs showing unusual referrers paired with encoded HTML entities in parameter values
Unexpected outbound requests from administrator browsers to attacker-controlled domains following plugin page visits
WordPress user activity originating from sessions with mismatched IP addresses or User-Agent strings

Detection Strategies

Deploy a web application firewall (WAF) with rules matching common XSS payload patterns targeting WordPress plugin parameters
Enable verbose access logging on the WordPress site and review entries containing the multilevel-referral-plugin-for-woocommerce path
Implement Content Security Policy (CSP) headers in report-only mode to surface inline script execution attempts
Correlate plugin request logs with authentication events to identify suspicious session activity

Monitoring Recommendations

Forward WordPress and reverse proxy logs to a centralized SIEM for retention and analysis
Alert on HTTP responses that reflect request parameters containing HTML control characters
Monitor administrative account behavior for unauthorized configuration or content changes
Track plugin version inventory across managed WordPress installations to identify vulnerable hosts

How to Mitigate CVE-2024-53742

Immediate Actions Required

Update the Multilevel Referral Affiliate Plugin for WooCommerce to a version newer than 2.27 once available from the vendor
Disable the plugin if a patched version is not yet released and the affiliate functionality is non-essential
Force password resets for WordPress administrator accounts that may have visited untrusted links
Audit the WordPress user table for unauthorized account creation or role modifications

Patch Information

At the time of NVD publication, the vendor advisory tracked through Patchstack identifies all versions through 2.27 as affected. Site operators should monitor the WordPress plugin repository and the vendor for an updated release that addresses the XSS sink.

Workarounds

Deploy a WAF rule blocking requests to plugin endpoints containing HTML metacharacters such as <, >, and " in query parameters
Apply a strict Content Security Policy that disallows inline scripts and restricts script sources to trusted origins
Restrict access to the WordPress administrative interface using IP allowlisting on the web server
Educate administrative users to avoid clicking unsolicited links referencing the WordPress site

bash

# Example ModSecurity rule to block reflected XSS payloads targeting the plugin
SecRule REQUEST_URI "@contains multilevel-referral-plugin-for-woocommerce" \
    "chain,phase:2,deny,status:403,id:1005374,msg:'Blocked potential XSS targeting CVE-2024-53742'"
    SecRule ARGS "@rx (?i)(<script|javascript:|onerror=|onload=)" "t:urlDecodeUni,t:htmlEntityDecode"