WordPress security changelog
HIGH CVE-2026-1273 Deferred

Post Grid Gutenberg Blocks for News, Magazines, Blog Websites – PostX: Server-side request forgery

Post Grid Gutenberg Blocks for News, Magazines, Blog Websites – PostX is affected by server-side request forgery. Exploitation requires at least administrator-level access. The vulnerable server can be induced to make attacker-selected network requests.

CVE / CNA score 7.2 CVSS 3.1 · security@wordfence.com
NVD score Pending NVD has not published its own CVSS assessment.
Component
Post Grid Gutenberg Blocks for News, Magazines, Blog Websites – PostX
Plugin slug
ultimate-post
Affected
See vendor advisory
Safe version
See mitigation notes
Published
Mar 04, 2026
Weakness
CWE-918 — Server-Side Request Forgery (SSRF)

This CVE was published Mar 04, 2026 and is one of 16 known issues for this plugin.

What to do

Update, patch or deactivate.

Update Post Grid Gutenberg Blocks for News, Magazines, Blog Websites – PostX to a release outside the affected range, or disable and remove it until a fixed version is available.

No confirmed safe version is listed. Consider a vendor-supported patch or temporarily restricting the affected functionality while you assess the risk.

Deactivate only when warranted by your risk profile, or when advised by your hosting provider in the limited circumstances where the vulnerability cannot otherwise be mitigated. If you’re unsure which action is appropriate, contact Fused or your hosting provider for guidance.

Source record

Technical description

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.

CVE / CNA vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N

References

Primary and upstream sources