CVE-2026-8778

The MIPL Grouped Checkout Fields for WooCommerce – Customize & Organize Checkout Fields plugin for WordPress is affected by an unrestricted file-upload flaw (CWE-434): the mipl_wc_upload_file function performs no file-type validation in all versions up to and including 1.2.1. An unauthenticated, remote attacker can trigger the flaw by submitting a crafted upload request over the network, with no authentication or user interaction required (CVSS 9.8, vector AV:N/AC:L/PR:N/UI:N). By uploading arbitrary files — for example a PHP script — to a web-executable location, the attacker may achieve remote code execution and compromise the site, matching the high confidentiality, integrity, and availability impact reflected in the critical 9.8 score. Any WordPress site, typically a WooCommerce store, running the plugin at version 1.2.1 or older is affected. As of the available data there is no public proof-of-concept, the issue is not listed in CISA's Known Exploited Vulnerabilities catalog, and no in-the-wild exploitation has been reported.

What to do: Update the plugin to the first available release newer than 1.2.1 once a patched version is published (no fixed version number is stated in the available data), or deactivate the plugin until a fix ships. As an interim mitigation, deny PHP execution in the upload destination used by the plugin (typically under wp-content/uploads) via web-server rules so uploaded files cannot run. Because the flaw is exploitable by unauthenticated users on internet-facing stores, check the uploads directory for unexpected PHP or other unfamiliar files and review web-server logs for unauthenticated POST requests to the plugin's upload endpoint.