CVE-2026-48871

The MW WP Form plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'post_id' parameter in all versions up to and including 5.1.7 due to insufficient input sanitization and output escaping. The CSRF gate protecting form submission is bypassable by any unauthenticated visitor who first loads the public form page to obtain a valid double-submit cookie.

The MW WP Form WordPress plugin before 5.1.5 does not prevent shortcodes in user-submitted values from being executed when it merges those values into a message that it later processes for shortcodes, allowing unauthenticated users to run any shortcode registered on the site. Exploitation requires the site to have been configured to echo a submitted value back to the visitor after submission.

The MW WP Form WordPress plugin before 5.1.6 does not sanitise and escape some of its form settings before outputting them back in an admin dashboard page, which could allow users with a role as low as Editor to perform Stored Cross-Site Scripting attacks against high privilege users such as admin.

Vulnerability in the MW WP Form plugin for WordPress up to version 5.1.1. Insufficient validation of the $name parameter allows an unauthenticated attacker to move arbitrary files on the server, potentially leading to remote code execution.