Description

The Content Blocks (Custom Post Widget) plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the plugin's content_block shortcode in all versions up to, and including, 3.3.9 due to insufficient input sanitization and output escaping on user supplied values consumed from user-created content blocks. This makes it possible for authenticated attackers, with contributor-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.

INFO

Published Date :

2026-04-18T09:26:52.078Z

Last Modified :

2026-04-20T13:48:40.598Z

Source :

Wordfence
AFFECTED PRODUCTS

The following products are affected by CVE-2026-0894 vulnerability.

Vendors Products
Johan Van Der Wijk
  • Content Blocks Custom Post Widget
Wordpress
  • Wordpress
REFERENCES

Here, you will find a curated list of external links that provide in-depth information to CVE-2026-0894.

URL Resource
https://plugins.trac.wordpress.org/changeset/3447914/custom-post-widget cve-icon cve-icon
https://www.wordfence.com/threat-intel/vulnerabilities/id/246dee15-82e0-4630-8d95-d2419e9eaef8?source=cve cve-icon cve-icon
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CVSS Vulnerability Scoring System

Detailed values of each vector for above chart.
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality Impact
Integrity Impact
Availability Impact