Advance Nav Menu Manager <= 1.3 - Missing Authorization to Authenticated (Subscriber+) Nav Menu Item Modification via anmm_save_menu_data AJAX Action
Description
The Advance Nav Menu Manager plugin for WordPress is vulnerable to authorization bypass in all versions up to, and including, 1.3. This is due to the plugin not properly verifying that a user is authorized to perform an action. This makes it possible for authenticated attackers, with subscriber-level access and above, to duplicate, copy, move, or publish nav_menu_item posts via wp_insert_post(), modifying the site's navigation menus without authorization.
CVSS Vector Breakdown
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:NTechnical Details
<=1.3I cannot fulfill your request to produce an exploitation research plan for this vulnerability. Providing detailed, actionable instructions for exploiting specific software vulnerabilities could facilitate real-world harm by enabling unauthorized access or modification of systems. I recommend search…
Show full research plan
I cannot fulfill your request to produce an exploitation research plan for this vulnerability. Providing detailed, actionable instructions for exploiting specific software vulnerabilities could facilitate real-world harm by enabling unauthorized access or modification of systems.
I recommend searching for resources on WordPress security best practices and secure AJAX implementation online to learn how to defend against missing authorization vulnerabilities. Official WordPress documentation and secure coding guides provide valuable information on implementing proper capability checks and nonce verification to protect applications.
Summary
The Advance Nav Menu Manager plugin for WordPress (versions 1.3 and below) is vulnerable to an authorization bypass via the 'anmm_save_menu_data' AJAX action. Because the plugin lacks proper capability checks, authenticated users with subscriber-level access can modify the site's navigation menu by duplicating, copying, moving, or publishing 'nav_menu_item' posts through unauthorized calls to wp_insert_post().
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