The Popup Box WordPress plugin before 5.5.0 does not properly validate nonces in the add_or_edit_popupbox() function before saving popup data, allowing unauthenticated attackers to perform Cross-Site Request Forgery attacks. When an authenticated admin visits a malicious page, the attacker can create or modify popups with arbitrary JavaScript that executes in the admin panel and frontend.
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Ays Popup Box Plugin | — | Update ays-popup-box plugin to version 5.5.0, or a newer patched version | Apr 30, 2026 | Apr 8, 2026 |
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