CVE-2025-15611 Popup Box AYS Pro < 5.5.0 - Admin+ Stored Cross-Site Scripting (XSS) via CSRF

What is CVE-2025-15611?

CVE-2025-15611 is a medium-severity cross-site scripting vulnerability in Unknown Popup Box, published on 7 Apr 2026. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.

Official description

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.

Weakness: CWE-918

Which versions are affected by CVE-2025-15611?

It affects 1 product.

Products include Ays-Pro Popup Box.

How do I fix CVE-2025-15611?

No fix has been published for CVE-2025-15611 yet. Limit exposure of the affected software until one is available.

Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.

Is CVE-2025-15611 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-15611 exists.

Other vulnerabilities in Unknown Popup Box

• CVE-2021-24458 Popup box < 2.3.4 - Authenticated Blind SQL Injections High 8.8
• CVE-2021-24460 Popup Like box - Page Plugin < 3.5.3 - Authenticated Blind SQL Injections High 8.8
• CVE-2023-27414 WordPress Popup box Plugin <= 3.4.4 is vulnerable to Cross Site Scripting (XSS) High 7.1
• CVE-2024-9599 Popup Box < 4.7.8 - Admin+ Stored XSS Medium 5.4
• CVE-2023-6591 Popup Box Pro < 20.9.0 - Admin+ Stored XSS Medium 4.8

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as GHSA-86pc-m9xh-3jg9.