WordPress DevKit Pro Plugin Authentication Bypass Leads to Admin Takeover

The DevKit Pro plugin for WordPress is vulnerable to an Authentication Bypass leading to administrator account takeover in all versions up to and including 2.3.0.

The flaw lies in the revert_switch handler, which trusts the attacker-controlled original_user_id cookie as the privileged identity. The verify_nonce_and_capability() function incorrectly checks the manage_options capability on the user identified by the cookie rather than on the actual requester via current_user_can().

When the cookie is present, the switch-back form and a valid session-bound nonce are publicly emitted via wp_footer to any visitor, including unauthenticated users. This allows an attacker to:

• Set the original_user_id cookie to any administrator's user ID
• Collect the rendered nonce
• POST it back to the revert_switch handler
• Trigger wp_set_auth_cookie() with the administrator's ID, granting a full administrator-level authenticated session and complete site takeover