CVE-2026-57402 in Flexible Refund and Return Order Plugin
Summary
by MITRE • 07/13/2026
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in wpdesk Flexible Refund and Return Order for WooCommerce flexible-refund-and-return-order-for-woocommerce allows Stored XSS.This issue affects Flexible Refund and Return Order for WooCommerce: from n/a through <= 1.0.51.
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Analysis
by VulDB Data Team • 07/13/2026
This cross-site scripting vulnerability represents a critical security flaw in the flexible-refund-and-return-order-for-woocommerce plugin for wordpress ecommerce platforms. The weakness stems from improper input sanitization during web page generation, specifically when processing user-supplied data within refund and return order functionalities. The vulnerability classifies as CWE-79 - Improper Neutralization of Input During Web Page Generation, which is a fundamental web application security issue that allows malicious scripts to be executed in the context of other users' browsers.
The stored nature of this cross-site scripting vulnerability means that malicious input entered by an attacker can be permanently stored on the server and subsequently executed whenever legitimate users view affected pages. This creates a persistent threat vector where attackers can inject malicious javascript code through the plugin's refund and return order forms, which then executes in the browsers of unsuspecting administrators or customers who visit the affected pages. The vulnerability impacts all versions from the initial release through version 1.0.51, indicating that the security flaw has existed for an extended period within the plugin's codebase.
The operational impact of this vulnerability extends beyond simple data theft or defacement. Attackers can leverage stored XSS to hijack user sessions, steal sensitive customer information, manipulate refund and return processes, and potentially gain administrative privileges within the wordpress environment. The attack surface is particularly concerning given that the plugin integrates with woocommerce's core functionality, meaning that successful exploitation could compromise entire online stores and their associated customer data. This vulnerability aligns with ATT&CK technique T1566.001 - Phishing: Spearphishing Attachment, as attackers could craft malicious refund or return requests containing exploit payloads.
Mitigation strategies should prioritize immediate plugin updates to version 1.0.52 or later where the XSS vulnerability has been patched. Administrators must also implement proper input validation and output encoding mechanisms throughout the plugin's codebase, ensuring that all user-supplied data is properly sanitized before being rendered in web pages. Additionally, implementing content security policies and regular security audits of wordpress plugins can prevent similar vulnerabilities from emerging in the future. The vulnerability demonstrates the critical importance of secure coding practices in ecommerce platforms where sensitive financial transactions occur, as the consequences of successful exploitation extend far beyond simple script execution to encompass complete system compromise and customer data breaches.