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CVE-2026-89270

CRITICAL 9.1 CVSS 3.1
Published
October 31, 2026
Last modified
November 2, 2026
NVD status
Deferred
Reported by
security@wordfence.com
Weakness
CWE-862
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H

Description

The Popup Builder – Create highly converting, mobile friendly marketing popups. plugin for WordPress is vulnerable to authorization bypass in all versions up to, and including, 4.4.5 This is due to the plugin not properly verifying that a user is authorized to perform an action. This makes it possible for unauthenticated attackers to trash all published popups on the site with a single unauthenticated GET request. The attack is amplified by a second flaw in SGPopup::find(), which returns false for every normally published popup when the sg_popup_preview_id parameter is present, causing the trash branch to fire against every popup on the site simultaneously.

Affected WordPress components

  • Popup Builder – Create highly converting, mobile friendly marketing popups. Plugin · popup-builder
    Confirmed match Active
    Up to and including 4.4.5
    View on WordPress.org

A confirmed match is backed by the plugin or theme slug. A possible match is based on the product name only and should be verified.

Affected products and versions

  • popupbuilder Popup Builder – Create highly converting, mobile friendly marketing popups. — Up to and including 4.4.5

References

  • plugins.trac.wordpress.org https://plugins.trac.wordpress.org/browser/popup-builder/tags/4.4.5/com/classes/Filters.php#L43
  • plugins.trac.wordpress.org https://plugins.trac.wordpress.org/browser/popup-builder/tags/4.4.5/com/classes/Filters.php#L435
  • plugins.trac.wordpress.org https://plugins.trac.wordpress.org/browser/popup-builder/tags/4.4.5/com/classes/popups/SGPopup.php#L1826
  • plugins.trac.wordpress.org https://plugins.trac.wordpress.org/browser/popup-builder/tags/4.4.5/com/classes/popups/SGPopup.php#L1830
  • plugins.trac.wordpress.org https://plugins.trac.wordpress.org/browser/popup-builder/tags/4.4.5/com/classes/popups/SGPopup.php#L257
  • plugins.trac.wordpress.org https://plugins.trac.wordpress.org/changeset/3755160/popup-builder/trunk/com/classes/popups/SGPopup.php
  • wordpress.org https://wordpress.org/plugins/popup-builder/
  • www.wordfence.com https://www.wordfence.com/threat-intel/vulnerabilities/id/13af3a6e-d3ef-41f0-9424-fe2c9b17c8bb?source=cve
  • nvd.nist.gov Official NVD record