Zero Radar
← feed
CriticalVulnerabilityCVE-2026-89270updated 31 Oct 2026, 11:29 UTC

Popup Builder WordPress plugin lets anyone trash your popups

Anyone on the internet can send a single web request that moves all your published popups to the trash, without logging in. Your popups stop showing to visitors until someone restores them.

Official, 2 sources
SeverityCriticalCVSS 9.1 of 10
Being exploited?UnclearNo reports either way yet
Fix available?UnclearNo fixed version published in the sources yet
How sure is this?Official, 2 sourcesBacked by an official source

How the attack works simplified

  1. 1Attacker sends requestUnauthenticated GET request to the site
  2. 2Missing authorization checkPlugin does not verify the user is allowed
  3. 3Preview parameter flawsg_popup_preview_id makes find() return false
  4. 4All popups trashedTrash action fires against every popup
  5. ResultAll published popups moved to trash

What happened

The Popup Builder plugin for WordPress has a missing authorization check, so unauthenticated GET requests can trash all published popups; a second flaw in SGPopup::find() makes the trash action apply to every popup when the sg_popup_preview_id parameter is present.

Why it is dangerous: Marketing and lead-capture popups can be removed from the site at will by anyone, disrupting campaigns and conversions. Sites running the affected plugin are at risk.

Are you affected?

You are affected if you run the Popup Builder WordPress plugin version 4.4.5 or earlier.

Popup Builder (WordPress plugin) all versions up to and including 4.4.5

What to do

  1. Check your installed Popup Builder version in WordPress Plugins screen
  2. Check the plugin vendor or WordPress.org page for a version newer than 4.4.5 and update if available
  3. If no fixed version is available, deactivate or restrict access to the plugin until a fix is released

Timeline

  1. 31 Oct 2026, 07:16 UTC
    Publicly disclosed
  2. 31 Oct 2026, 07:16 UTC
    Reported by NVD · NVD
  3. 31 Oct 2026, 07:18 UTC
    Picked up by Zero Radar
  4. 31 Oct 2026, 11:29 UTC
    GitHub Advisory reported on it · GitHub Advisory

Sources 2 reports, oldest first

Official vendor, government CERT or advisory database

Technical details

ID
CVE-2026-89270 · GHSA-94hg-gmrm-ppjj
CVSS
9.1 / 10
EPSS
0.4% chance of exploitation within 30 days
Disclosed
31 Oct 2026, 07:16 UTC
On Zero Radar
31 Oct 2026, 07:18 UTC (2 min after disclosure)
Last change
31 Oct 2026, 11:29 UTC

The plain-language parts and the attack diagram were written by an AI model (claude-haiku-5-5) from the sources above. Facts like versions, exploitation and dates come from the sources themselves. How Zero Radar works

Popup Builder WordPress plugin lets anyone trash your popups · Zero Radar