CVE-2026-1273: Wpxpo Post Grid Gutenberg Blocks For News, Magazines, Blog Websites – Postx

High severity, CVSS 7.2. EPSS: 0.3% chance of exploitation in the next 30 days.

The Post Grid Gutenberg Blocks for News, Magazines, Blog Websites – PostX plugin for WordPress is vulnerable to Server-Side Request Forgery in all versions up to, and including, 5.0.8 via the `/ultp/v3/starter_dummy_post/` and `/ultp/v3/starter_import_content/` REST API endpoints. This makes it possible for authenticated attackers, with Administrator-level access and above, to make web requests to arbitrary locations originating from the web application and can be used to query and modify information from internal services.

Affected products

• Wpxpo Post Grid Gutenberg Blocks For News, Magazines, Blog Websites – Postx: up to and including 5.0.8

Published 2026-03-04. Last modified 2026-06-17.