CVE-2026-15450

01/Description

The Nex Forms – Ultimate Form Builder – Lite plugin for WordPress is vulnerable to arbitrary file deletion via path traversal in versions up to, and including, 9.2.3. This is due to the delete_file() AJAX handler retrieving a file path from the database and passing it directly to unlink() with no validation (no realpath(), basename(), or allowlist check), combined with the insert_record() AJAX handler that lets the same authenticated user store an arbitrary value in the target 'location' column (wp_kses() only strips HTML tags and does not neutralize path traversal or absolute paths). This makes it possible for authenticated attackers, with admin-level access and above, to delete arbitrary files on the affected site's server, including wp-config. When the plugin's user-level option is configured to something else, this may be exploitable with lower privileges.

02/References5

• plugins.trac.wordpress.org/browser/nex-forms-express-wp-form-bu…
• plugins.trac.wordpress.org/browser/nex-forms-express-wp-form-bu…
• plugins.trac.wordpress.org/browser/nex-forms-express-wp-form-bu…
• plugins.trac.wordpress.org/changeset?reponame=&old=3625615%40ne…
• www.wordfence.com/threat-intel/vulnerabilities/id/bb5c8cb3-df67…