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CVE-2026-16149 is a missing authorization vulnerability in the Security Hardener plugin for WordPress affecting all versions up to and including 2.4.4. The flaw is introduced by the plugin’s user-enumeration protection logic, enabled by default, which hooks the WordPress rest_endpoints filter through the secure_user_endpoints() function and replaces the permission_callback for the WordPress REST API user routes with a closure that only checks whether the requester is authenticated. In doing so, it strips the original authorization checks normally enforced by WP_REST_Users_Controller on the user-management endpoints, including capability checks such as create_users, promote_user, edit_users, and delete_users. The affected routes include the core user collection and individual user endpoints, and the overwrite impacts write operations such as POST, PUT, PATCH, and DELETE. As a result, any authenticated user with Subscriber-level access or higher can invoke privileged user-management actions that should be restricted to higher-privileged roles, including creating a new administrator account or modifying an existing administrator account to reset its password.
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No public exploit code observed for this vulnerability.
8 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
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Every observed campaign linking this CVE to a named adversary.
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Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.