CVE-2026-0718

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

View on CVE.org

Published Apr 16, 2026 CVSS 3.1 · 5.3 Medium EPSS < 1% KEV · Not listed

Description

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.

Analysis

Technical impact

The Post Grid Gutenberg Blocks for News, Magazines, Blog Websites – PostX plugin contains a missing capability check (CWE‑862) in the ultp_shareCount_callback() function, allowing any attacker to alter the share_count post meta of any post, including private or draft ones. This flaw compromises data integrity and can be used to manipulate engagement metrics.

Affected Systems

WordPress users of the "Post Grid Gutenberg Blocks for News, Magazines, Blog Websites – PostX" plugin, with all versions up to and including 5.0.5, are affected. Updates beyond 5.0.5 are presumed to contain the fix.

Risk and Exploitability

The vulnerability carries a CVSS score of 5.3, indicating moderate severity. EPSS information is unavailable and the issue is not listed in the CISA KEV catalog, so the likelihood of exploitation is unknown but potentially significant given the unauthenticated nature of the attack vector. Exploitation would involve sending crafted requests to the plugin’s callback endpoint from an external source, requiring no special privileges.

Affected Products

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions

wpxpo

Post Grid Gutenberg Blocks for News, Magazines, Blog Websites – PostX

unaffected

Version	Status	Constraints
`0`	affected	≤ 5.0.5

No data.

Vendor Product Versions

Wordpress

Version	Status	Scheme	Platform
`—`	unaffected	—	—

Wpxpo

Post Grid Gutenberg Blocks For News, Magazines, Blog Websites – Postx

Version	Status	Scheme	Platform
`[0,5.0.5]`	affected	generic	—

Remediation

No solution or workaround provided in the CVE record.

OpenCVE Recommended Actions

Upgrade the Post Grid Gutenberg Blocks for News, Magazines, Blog Websites – PostX plugin to version 5.0.6 or later, which addresses the missing authorization check.
If an immediate upgrade is not possible, disable the share count functionality or prevent public access to the ultp_shareCount_callback endpoint by either deactivating the plugin or restricting access through server configuration.
Monitor WordPress logs for unusual activity involving the ultp_shareCount_callback endpoint to detect potential exploitation attempts.

Generated by OpenCVE AI on April 17, 2026 at 03:28 UTC.

Tracking

Advisories

No advisories available

Metrics

No CVSS v4.0

Attack Vector Network

Attack Complexity Low

Privileges Required None

Scope Unchanged

Confidentiality Impact None

Integrity Impact Low

Availability Impact None

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

Exploit prediction score: < 1% (0.288% probability within 30 days)

Exploitation none

Automatable yes

Technical Impact partial

References

Link	Providers
https://plugins.trac.wordpress.org/changeset?old_path=/ultimate-post/tags/5.0.5/classes/Blocks.php&new_path=/ultimate-post/tags/5.0.6/classes/Blocks.php
https://www.wordfence.com/threat-intel/vulnerabilities/id/c4b2cf3b-5d35-4ce6-9453-1538a6f7752f?source=cve

History

Apr 16, 2026 1:15 PM Scoring metrics updated View changes

Type	Values Removed	Values Added
Metrics		ssvc `{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}`

Apr 16, 2026 10:00 AM First appearance in the feed. Affected vendors updated View changes

Type	Values Removed	Values Added
First Time appeared		Wordpress Wordpress wordpress Wpxpo Wpxpo post Grid Gutenberg Blocks For News, Magazines, Blog Websites – Postx
Vendors & Products		Wordpress Wordpress wordpress Wpxpo Wpxpo post Grid Gutenberg Blocks For News, Magazines, Blog Websites – Postx

Apr 16, 2026 7:45 AM Description updated. Title updated. Weaknesses updated. Added references. Scoring metrics updated View changes

Type	Values Removed	Values Added
Description		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.
Title		Post Grid Gutenberg Blocks for News, Magazines, Blog Websites – PostX <= 5.0.5 - Missing Authorization to Limited Post Meta Modification
Weaknesses		CWE-862
References		https://plugins.trac.wordpress.org/changeset?old_path=/ultimate-post/tags/5.0.5/classes/Blocks.php&new_path=/ultimate-post/tags/5.0.6/classes/Blocks.php https://www.wordfence.com/threat-intel/vulnerabilities/id/c4b2cf3b-5d35-4ce6-9453-1538a6f7752f?source=cve
Metrics		cvssV3_1 `{'score': 5.3, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N'}`