CVE-2025-4212 is a stored cross-site scripting vulnerability in the Checkout Files Upload for WooCommerce plugin for WordPress. The flaw exists due to improper neutralization of input during web page generation, specifically insufficient sanitization and escaping of uploaded files. This allows unauthenticated attackers to embed arbitrary web scripts within image files that execute when a user views the injected content. The vulnerability affects all plugin versions up to and including 2.2.1. The CVSS 3.1 base score is 7.2, reflecting network attack vector, low attack complexity, no privileges or user interaction required, and impacts confidentiality and integrity with a scope change.

Successful exploitation enables unauthenticated attackers to execute arbitrary scripts in the context of users viewing the affected pages, potentially leading to data theft, session hijacking, or other malicious actions impacting confidentiality and integrity. Availability is not affected. The vulnerability affects all users of the plugin versions up to 2.2.1 who allow file uploads through the checkout process.

Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is released, users should consider disabling the file upload feature or restricting file types and implementing additional input validation and output escaping controls at the application or web server level to mitigate the risk of script injection.