The DevKit Pro plugin for WordPress is vulnerable to Authentication Bypass Leading to Administrator Account Takeover in all versions up to, and including, 2.3.0 This is due to the `revert_switch` handler trusting the attacker-controlled `original_user_id` cookie as the privileged identity: `verify_nonce_and_capability()` incorrectly checks the `manage_options` capability on the user identified by the cookie rather than on the actual requester via `current_user_can()`, while the switch-back form and a valid session-bound nonce are emitted publicly via `wp_footer` to any visitor — including unauthenticated users — whenever that cookie is present. This makes it possible for unauthenticated attackers to set the `original_user_id` cookie to any administrator's user ID, collect the rendered nonce, and POST it back to the `revert_switch` handler, causing `wp_set_auth_cookie()` to be called with the administrator's ID and granting the attacker a full administrator-level authenticated session and complete site takeover.
[POC] CVE-2026-14378 — CVE-2026-14378
PoC for CVE-2026-14378: DevKit Pro ≤2.3.0 unauthenticated admin takeover via original_user_id cookie + revert_switch nonce. check/admin + mass scan.
[POC] CVE-2026-14378 — CVE-2026-14378-DevKit-Pro-Auth-Bypass
Defensive analysis, patch breakdown, and detection scanner for CVE-2026-14378 (WordPress DevKit Pro Plugin <= 2.3.0).
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
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