CVE-2026-19949

The All-in-One WP Migration and Backup WordPress plugin before version 7.111 does not perform any capability check on several of its AJAX actions, gating them only on an installation-wide secret which it discloses to any user permitted to export the site, allowing such a user to import an arbitrary site archive and gain administrator access. Exploitation requires an administrator to have granted the export capability to a role that does not hold the plugin's own import capability, which is not a default configuration.

The All-in-One WP Migration and Backup plugin for WordPress is vulnerable to Insufficient Credential Protection in versions up to, and including, 7.110. This is due to the `Ai1wm_Main_Controller::init()` method — registered on the `admin_init` hook, which fires unauthenticated on `admin-ajax.php` and `admin-post.php` requests — reading `$_SERVER['PHP_AUTH_USER']` and `$_SERVER['PHP_AUTH_PW']` from any incoming request and writing them to the `ai1wm_auth_header` option via `update_option()` as a reversible base64-encoded string, with no capability check, nonce verification, `is_user_logged_in()` check, or confirmation that Basic authentication actually succeeded. This makes it possible for unauthenticated attackers to capture into the database, in reversible base64 form, any WordPress Application Password or HTTP Basic credential presented to `/wp-admin/` by a legitimate integration, or to overwrite the stored credential with an attacker-chosen value by sending an anonymous request carrying a crafted `Authorization: Basic` header.

The All-in-One WP Migration and Backup WordPress plugin before version 7.108 does not restrict migration import to network administrators on multisite, allowing a subsite admin to execute arbitrary PHP code across the entire network.

The All-in-One WP Migration and Backup WordPress plugin before version 7.106 does not properly sanitize a user-supplied value before using it to build a file path, allowing unauthenticated attackers to create or append a log file in arbitrary locations outside its intended storage directory.