---
id: CVE-2026-87915
title: >-
  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 …
summary: >-
  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 …
severity: high
cvss: 7.2
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N'
cwe:
  - CWE-79
vendor: danieliser
product: >-
  Popup Maker – Boost Sales, Conversions, Optins, Subscribers with the Ultimate
  WP Popup Builder
affected:
  - >-
    popup_maker_boost_sales_conversions_optins_subscribers_with_the_ultimate_wp_popup_builder
    <= 1.24.0
published: '2026-09-18'
updated: '2026-09-18'
sourceUpdated: '2026-09-18T15:17:17.347'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-87915'
references:
  - url: >-
      https://plugins.trac.wordpress.org/browser/popup-maker/tags/1.24.0/classes/Abstract/Database.php#L359
    label: security@wordfence.com
  - url: >-
      https://plugins.trac.wordpress.org/browser/popup-maker/tags/1.24.0/classes/Admin/Subscribers/Table.php#L281
    label: security@wordfence.com
  - url: >-
      https://plugins.trac.wordpress.org/browser/popup-maker/tags/1.24.0/classes/ListTable.php#L1408
    label: security@wordfence.com
  - url: >-
      https://plugins.trac.wordpress.org/browser/popup-maker/tags/1.24.0/classes/Newsletters.php#L273
    label: security@wordfence.com
  - url: >-
      https://plugins.trac.wordpress.org/browser/popup-maker/tags/1.24.0/classes/Newsletters.php#L59
    label: security@wordfence.com
  - url: >-
      https://plugins.trac.wordpress.org/browser/popup-maker/tags/1.24.0/classes/Newsletters.php#L74
    label: security@wordfence.com
  - url: >-
      https://plugins.trac.wordpress.org/changeset/3690634/popup-maker/trunk/classes/Admin/Subscribers/Table.php
    label: security@wordfence.com
  - url: >-
      https://plugins.trac.wordpress.org/changeset?reponame=&new=3690634%40popup-maker%2Ftags%2F1.25.0&old=3648112%40popup-maker%2Ftags%2F1.24.0
    label: security@wordfence.com
  - url: >-
      https://www.wordfence.com/threat-intel/vulnerabilities/id/ea8b1eee-2e3f-4d61-b815-4ea0aaa188b5?source=cve
    label: security@wordfence.com
tags:
  - nvd
  - cve.org
  - exploit-available
ssvc:
  exploitation: none
  automatable: 'yes'
  technicalImpact: partial
  timestamp: '2026-09-18T14:40:14.518486Z'
epss: 0.00494
epssPercentile: 0.39865
ingestedAt: '2026-09-18T09:38:46.159Z'
exploits:
  github: 1
  githubRepos:
    - 'https://github.com/pwnVader/CVE-2026-87915-PoC-pwnVader'
  checkedAt: '2026-09-26T09:06:04.046Z'
exploitAvailable: true
---

## Overview

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.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.