CVE-2026-87915: danieliser popup maker – boost sales, conversions, optins, subscribers with the ultimate wp popup builder Cross-site Scripting

Vulnerability summary

CVE-2026-87915 is a high (CVSS 7.2) Cross-site Scripting vulnerability in danieliser popup maker – boost sales, conversions, optins, subscribers with the ultimate wp popup builder. EPSS estimates a 0.49% chance of exploitation in the next 30 days, higher than 41.2% of scored vulnerabilities. Fixed in 1.25.0.

Timeline

1. 18-09-2026
   PublishedVulnerability first disclosed.
2. 18-09-2026
   Last modifiedVulnerability information updated.

Description

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 values[Name] Parameter in all versions up to, and including, 1.24.0 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. The wp_kses sanitization applied on output is insufficient in this context because HTML entities within allowed attribute values survive normalization intact and are later evaluated by the jQuery(link.attr('href')) sink in wp-admin/js/common.js when a contextual help tab anchor is clicked.

• CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.