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The SureCart plugin for WordPress is vulnerable to unauthenticated account takeover in all versions up to, and including, 4.9.5. The passwordless one-time-code login REST route (VerificationCodeController::verify(), whose permission callback returns true) resolves an attacker-supplied login to any WordPress user, verifies a 6-digit code, and on success calls $user->login() → wp_set_auth_cookie() for a user of any role. In the affected versions this path has no per-account attempt counter, no persistent email/IP lockout or rate limit (the upstream CDN throttle is bypassable via IP rotation), and no restriction preventing high-privilege accounts from being logged in through it. An unauthenticated attacker can trigger a code for any user (including an administrator) via the companion unauthenticated endpoint and brute-force the 6-digit code to obtain an authenticated session as that user, resulting in a full administrator account takeover.

• https://www.wordfence.com/threat-intel/vulnerabilities/id/dffdcaa2-5100-48f5-9b82-e22075fd87e5?source=cve
• https://plugins.svn.wordpress.org/surecart/trunk/app/src/Controllers/Rest/VerificationCodeController.php
• https://plugins.svn.wordpress.org/surecart/trunk/app/src/Rest/VerificationCodeRestServiceProvider.php
• https://plugins.svn.wordpress.org/surecart/trunk/app/src/Models/User.php
• https://wordpress.org/plugins/surecart/#developers