What the vulnerability does
01Description
The Post Grid Gutenberg Blocks and WordPress Blog Plugin – PostX plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the plugin's file uploading feature in all versions up to, and including, 4.1.1 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with Author-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.
Explanation of Vulnerability in Simple Terms
02Summary
Post Grid Gutenberg Blocks for News, Magazines, Blog Websites (PostX) versions 4.1.1 and earlier contain a stored cross-site scripting vulnerability. An authenticated user with low privileges can inject malicious scripts that execute in the browsers of other site visitors, potentially compromising their accounts or stealing sensitive data. The vulnerability affects the plugin's block rendering functionality.
What an attacker can do
03Attacker Capabilities
Inject malicious JavaScript that runs in other users' browsers when they view affected pages.
Potential impact on your site
04Site Impact
Visitors and administrators may have their sessions hijacked, credentials stolen, or site content defaced.
Conditions required to exploit
05Prerequisites
Attacker must have a low-privilege WordPress account (e.g., contributor or author role).
Key dates
06Disclosure timeline
May 30, 2024
CVE published
April 8, 2026
Record updated
