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Vulnerability · Published Sep 18, 2026 · Assigned by Wordfence

CVE-2026-87915Popup Maker <= 1.24.0 - Unauthenticated Stored Cross-Site Scripting via values[Name] Parameter

High 7.2

In plain English

A high-severity cross-site scripting in Popup Maker – Boost Sales, Conversions, Optins, Subscribers with the Ultimate WP Popup Builder from danieliser. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.5% (higher than 43% of all known vulnerabilities). Ready-made attack tooling exists: public proof-of-concept code.

Severity (CVSS 3.1)7.2High
Exploit odds (30 days)0.5%top 57.4% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack tooling1Public PoC

Official 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.

Affected products (as reported)

VendorProductVersions
danieliser Popup Maker – Boost Sales, Conversions, Optins, Subscribers with the Ultimate WP Popup Builder 0 – through 1.24.0

Weakness: CWE-79 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N

References