CVE-2026-15797: Danieliser Popup Maker – Boost Sales, Conversions, Optins, Subscribers With The Ultimate Wp Popup Builder

Medium severity, CVSS 6.4. EPSS: 0.3% chance of exploitation in the next 30 days.

The Popup Maker – Boost Sales, Conversions, Optins, Subscribers with the Ultimate WP Popup Builder plugin for WordPress is vulnerable to Stored Cross-Site Scripting via post_title in all versions up to, and including, 1.24.0 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with contributor-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. This requires the attacker to create a post with an HTML entity-encoded payload in the title, which bypasses sanitize_text_field on save and is later decoded and executed by the browser when rendered by the Select2 component.

Affected products

• Danieliser Popup Maker – Boost Sales, Conversions, Optins, Subscribers With The Ultimate Wp Popup Builder: up to and including 1.24.0

Published 2026-09-18. Last modified 2026-09-19.