CVE-2026-1273 PUBLISHED

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.

• Mohammad Amin Hajian finder
• Pouria Shahba finder

• https://www.wordfence.com/threat-intel/vulnerabilities/id/afe6d4ac-1712-415e-9995-cb7c8fe4e1a0?source=cve
• https://plugins.trac.wordpress.org/browser/ultimate-post/tags/5.0.5/classes/Importer.php#L196
• https://plugins.trac.wordpress.org/browser/ultimate-post/trunk/classes/Importer.php#L196
• https://plugins.trac.wordpress.org/browser/ultimate-post/trunk/classes/Importer.php#L261
• https://plugins.trac.wordpress.org/browser/ultimate-post/tags/5.0.5/classes/Importer.php#L261
• https://plugins.trac.wordpress.org/changeset?sfp_email=&sfph_mail=&reponame=&old=3469409%40ultimate-post&new=3469409%40ultimate-post&sfp_email=&sfph_mail=

• CWE-918 Server-Side Request Forgery (SSRF) CWE