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Executive Summary

CVE-2026-57402 is a Cross Site Scripting (XSS) vulnerability found in the WordPress Flexible Refund and Return Order for WooCommerce Plugin, versions 1.0.51 and below.

This vulnerability occurs due to improper neutralization of input during web page generation, allowing attackers to inject malicious scripts into the website.

These malicious scripts can execute harmful payloads such as redirects or unwanted advertisements when visitors access the affected site.

Exploitation requires a privileged user to perform an action like clicking a malicious link or submitting a form.

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Impact Analysis

This vulnerability can lead to attackers injecting malicious scripts that execute harmful actions on your website, such as redirecting visitors to malicious sites or displaying unwanted advertisements.

Because the vulnerability requires a privileged user to interact with a malicious element, it poses a moderate risk but can be exploited in large-scale attacks targeting many websites.

Successful exploitation can compromise the integrity and trustworthiness of your website, potentially harming your users and your reputation.

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Detection Guidance

This vulnerability involves stored Cross-Site Scripting (XSS) in the WordPress Flexible Refund and Return Order for WooCommerce plugin versions 1.0.51 and below. Detection typically involves identifying malicious script injections in web pages generated by the plugin.

While no specific commands are provided in the resources, common detection methods include scanning the affected web pages or database entries for suspicious script tags or payloads that could indicate stored XSS.

Additionally, monitoring web traffic for unusual redirects or unexpected script execution when accessing pages related to the plugin may help detect exploitation attempts.

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Mitigation Strategies

The immediate mitigation step is to update the Flexible Refund and Return Order for WooCommerce plugin to version 1.0.52 or later, where the vulnerability is patched.

Until the update can be applied, it is recommended to implement the mitigation rule provided by Patchstack to block attacks targeting this vulnerability.

Since the vulnerability requires a privileged user action, restricting user privileges and educating users about the risks of clicking suspicious links or submitting untrusted forms can also reduce risk.

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