CVE-2026-89270: popupbuilder Popup Builder – Create highly converting, mobile friendly marketing popups.

Popup Builder <= 4.4.5 - Missing Authorization to Unauthenticated Arbitrary Popup Post Trashing via 'post_type' and 'sg_popup_preview_id' Parameters

CVSS 9.1 CriticalCriticalEPSS 0.0039 · 33rd percentile

Critical, because:

CVSS score 9.1: 9.0 or more.

How we decide what’s critical

Published by the CVE Program (CNA: Wordfence) at 31 Oct 2026, 06:44 UTC. agentprime has not analysed this yet, so whether it affects any app is not known. This CVE names a vendor and product rather than a package, so the lockfile check doesn’t match it.

Affected products, as the CNA wrote them
Vendor	Product	Versions
popupbuilder	Popup Builder – Create highly converting, mobile friendly marketing popups.	affected 4.4.5 and earlier semver Other versions: unaffected

Not analysed yet

We haven’t published our own analysis of this CVE. If a person reviews it, this page will say what’s affected and what has to be true for it to matter.

Severity and exploitation

Score	Rating	CVSS	Vector	Source
9.1	Critical	3.1	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H	CNA (Wordfence)

CISA KEV Not listed.
EPSS 0.0039, the 33rd percentile, on 6 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

31 Oct 2026, 06:44 UTC Confirmed by the CVE List
31 Oct 2026, 07:16 UTC Confirmed by NVD
31 Oct 2026, 20:00 UTC First seen by agentprime

Sources

References from the CNA

Facts on this page come from the CVE List as the CNA published them, with CVSS from the sources named above, CISA KEV and FIRST EPSS. Vendors, products and versions are shown as the CNA wrote them. We don’t reproduce the CVE’s description.