CVE-2026-0718

Post Grid Gutenberg Blocks for News, Magazines, Blog Websites – PostX <= 5.0.5 - Missing Authorization to Limited Post Meta Modification

2026-04-15 18:53
Mohammad Amin Hajian (mamadrce)

Strategic Overview

Status
Patched in 5.0.6
Affected Plugin
Post Grid Gutenberg Blocks – PostX
Affected Version
<= 5.0.5
CVSS
5.3Medium
Weakness type
CWE-862 · Missing Authorization
CVE
CVE-2026-0718
View all Post Grid Gutenberg Blocks – PostX vulnerabilities

At a glance

CVE-2026-0718 is a medium-severity Missing Authorization vulnerability in the Post Grid Gutenberg Blocks WordPress plugin, affecting versions <= 5.0.5. It carries a CVSS score of 5.3 (reachable over the network; low attack complexity). Exploitation requires no authentication. The issue is fixed in version 5.0.6; sites on affected versions should update now. Disclosed April 2026, reported by Mohammad Amin Hajian (mamadrce).

Vulnerability Overview

The Post Grid Gutenberg Blocks for News, Magazines, Blog Websites – PostX plugin for WordPress is vulnerable to unauthorized modification of data due to a missing capability check on the ultp_shareCount_callback() function in all versions up to, and including, 5.0.5. This makes it possible for unauthenticated attackers to modify the share_count post meta for any post, including private or draft posts.

Technical Analysis

The vector marks this flaw as remotely reachable over the network, with low attack complexity — no special timing or configuration is needed, and no privileges on the target site, and no interaction from a victim user.

CWE-862: Missing Authorization

Post Grid Gutenberg Blocks <= 5.0.5 carries this weakness at ultp_shareCount_callback(), and reaching it takes a caller who can reach the endpoint. A missing authorization check means a function is reachable by anyone who can reach the endpoint, because the code never asks whether the caller is allowed to perform the action.

Any user who can reach the endpoint gets to run an action reserved for higher-privileged roles, from reading protected data to changing settings or content. For Post Grid Gutenberg Blocks the fix is 5.0.6: builds <= 5.0.5 are affected, anything from 5.0.6 onward is not.

Remediation

Update to version 5.0.6, or a newer patched version

How does WordSec protect against this?

Because it turns on account access, WordSec's login security is the relevant layer: role-based two-factor, captcha and brute-force limits raise the cost of getting the account this needs. None of that substitutes for the fix: Post Grid Gutenberg Blocks 5.0.6 closes this, and updating the plugin is the step that ends it.

  • Login Security
  • Alerts

External References

https://www.cve.org/CVERecord?id=CVE-2026-0718https://www.wordfence.com/threat-intel/vulnerabilities/id/c4b2cf3b-5d35-4ce6-9453-1538a6f7752fhttps://nvd.nist.gov/vuln/detail/CVE-2026-0718

Related records

Vulnerability data © Defiant, Inc., provided under the Wordfence Intelligence T&C