CVE-2026-89270 json
Popup Builder <= 4.4.5 - Missing Authorization to Unauthenticated Arbitrary Popup Post Trashing via 'post_type' and 'sg_popup_preview_id' Parameters
published 2026-10-31 9 d ago modified 2026-11-02 6 d ago also EUVD-2026-114593
- cvss
- 9.1
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.4%
- EPSS 0.4% chance of exploitation in 30 days, percentile 33%
- public exploits
- 0
- none known
Summary
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.
CISA SSVC
- Exploitation
- none
- Automatable
- yes
- Technical impact
- partial
- Assessed
- 6 d ago
Exploit prediction
0.39% chance of exploitation in the next 30 days, higher than 33% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 9.1 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H |
Affected products
- popupbuilder Popup Builder – Create highly converting, mobile friendly marketing popups.
Classification
- Weakness
-
- CWE-862 Missing Authorization
- Technology feeds
References
- wordfence.com /threat-intel/vulnerabilities/id/13af3a6e-d3ef-41f0-9424-fe2c9b17c8bb?source=cve
- plugins.trac.wordpress.org /browser/popup-builder/tags/4.4.5/com/classes/popups/SGPopup.php#L1830
- plugins.trac.wordpress.org /browser/popup-builder/tags/4.4.5/com/classes/Filters.php#L43
- plugins.trac.wordpress.org /browser/popup-builder/tags/4.4.5/com/classes/Filters.php#L435
- plugins.trac.wordpress.org /browser/popup-builder/tags/4.4.5/com/classes/popups/SGPopup.php#L257
- plugins.trac.wordpress.org /browser/popup-builder/tags/4.4.5/com/classes/popups/SGPopup.php#L1826
- wordpress.org /plugins/popup-builder/
- plugins.trac.wordpress.org /changeset/3755160/popup-builder/trunk/com/classes/popups/SGPopup.php
Sources
- CVE List CVE-2026-89270
- NVD CVE-2026-89270
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.