CVE-2025-26566
Published: 26 March 2025
Summary
CVE-2025-26566 is a high-severity Cross-site Scripting (CWE-79) vulnerability. Its CVSS base score is 7.1 (High).
Operationally, exploitation aligns with the MITRE ATT&CK technique Exploit Public-Facing Application (T1190); ranked at the 29.9th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog.
The strongest mitigations our analysis identified are NIST 800-53 SI-10 (Information Input Validation) and SI-15 (Information Output Filtering).
Deeper analysis
CVE-2025-26566 is an Improper Neutralization of Input During Web Page Generation vulnerability, enabling Reflected Cross-Site Scripting (XSS) as classified under CWE-79. It affects the In Stock Mailer for WooCommerce WordPress plugin (in-stock-mailer-for-woocommerce) in all versions up to and including 2.1.1. The vulnerability carries a CVSS v3.1 base score of 7.1 (AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:L), indicating high severity due to its network accessibility, low attack complexity, and lack of required privileges.
Attackers can exploit this vulnerability remotely without authentication by crafting malicious inputs or links that, when interacted with by a user (such as clicking a link), reflect and execute arbitrary JavaScript in the victim's browser context. This requires user interaction but changes scope, potentially allowing limited impacts like theft of session cookies, keystroke logging, or minor page modifications within the plugin's affected pages.
The Patchstack advisory provides further details on the vulnerability and mitigation, available at https://patchstack.com/database/Wordpress/Plugin/in-stock-mailer-for-woocommerce/vulnerability/wordpress-in-stock-mailer-for-woocommerce-plugin-2-1-1-reflected-cross-site-scripting-xss-vulnerability?_s_id=cve.
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2025-8168
Vulnerability details
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in Frank In Stock Mailer for WooCommerce in-stock-mailer-for-woocommerce allows Reflected XSS.This issue affects In Stock Mailer for WooCommerce: from n/a through <= 2.1.1.
- CWE(s)
Related Threats
MITRE ATT&CK Enterprise TechniquesAI
Why these techniques?
The CVE describes a reflected XSS vulnerability in a public-facing WordPress plugin, directly enabling exploitation of public-facing applications (T1190) and arbitrary JavaScript execution via crafted inputs/links (T1059.007).
CVEs Like This One
Affected Assets
Mitigating Controls
Mitigating Controls (NIST 800-53 r5) AI
Requires filtering of information outputs to neutralize malicious scripts in web page generation, directly preventing reflected XSS execution in the victim's browser.
Mandates validation of user inputs to reject or sanitize malicious payloads before they are reflected in web pages by the WooCommerce plugin.
Ensures timely identification, reporting, and correction of the specific flaw in the In Stock Mailer plugin, remediating the XSS vulnerability through patching.