CVE-2026-89270
9.1, criticalPopupbuilder Popup Builder - Create highly converting, mobile friendly marketing popups. Missing Authorization Vulnerability
- CVSS
- 9.1, critical critical CVSS v3.1
- EPSS, next 30 days
- 0.4% higher than 33.5% of scored CVEs
- Exploitation
- No public evidence
- Published
- 31 Oct 2026yesterday
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.
Details
- Vendor
- Popupbuilder
- Product
- Popup Builder - Create highly converting, mobile friendly marketing popups.
- Weakness
- CWE-862 (opens in a new tab)
- Status
- Received
- Updated
- 31 Oct 2026
- Assigner
- security@wordfence.com
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H
References 8
Other references 8
- plugins.trac.wordpress.org /browser/popup-builder/tags/4.4.5/com/classes/Filters.php#L43 (opens in a new tab)
- plugins.trac.wordpress.org /browser/popup-builder/tags/4.4.5/com/classes/Filters.php#L435 (opens in a new tab)
- plugins.trac.wordpress.org /browser/popup-builder/tags/4.4.5/com/classes/popups/SGPopup.php#L1826 (opens in a new tab)
- plugins.trac.wordpress.org /browser/popup-builder/tags/4.4.5/com/classes/popups/SGPopup.php#L1830 (opens in a new tab)
- plugins.trac.wordpress.org /browser/popup-builder/tags/4.4.5/com/classes/popups/SGPopup.php#L257 (opens in a new tab)
- plugins.trac.wordpress.org /changeset/3755160/popup-builder/trunk/com/classes/popups/SGPopup.php (opens in a new tab)
- wordpress.org /plugins/popup-builder/ (opens in a new tab)
- wordfence.com /threat-intel/vulnerabilities/id/13af3a6e-d3ef-41f0-9424-fe2c9b17c8bb?source=cve (opens in a new tab)
The kind is read from NVD's tags where present and from the shape of the URL otherwise, so treat it as a hint.
Beyond this page
Is CVE-2026-89270 in your network?
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Assembled from the NVD 2.0 API, the CISA Known Exploited Vulnerabilities Catalog and FIRST EPSS. Scores are as of our last collection on 1 Nov 2026, not the live upstream state.