Content Blocks (Custom Post Widget) <= 3.3.0 - Authenticated (Contributor+) Local File Inclusion via Shortcode

8.8
Improper Control of Filename for Include/Require Statement in PHP Program ('PHP Remote File Inclusion')
CVE CVE-2024-3564
CVSS 8.8 (High)
Publicly Published May 31, 2024
Last Updated June 1, 2024
Researcher Krzysztof Zając - CERT PL

Description

The Content Blocks (Custom Post Widget) plugin for WordPress is vulnerable to Local File Inclusion in all versions up to, and including, 3.3.0 via the plugin's 'content_block' shortcode. This makes it possible for authenticated attackers, with contributor-level access and above, to include and execute arbitrary files on the server, allowing the execution of any PHP code in those files. This can be used to bypass access controls, obtain sensitive data, or achieve code execution in cases where images and other “safe” file types can be uploaded and included.

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Vulnerability Details for Content Blocks (Custom Post Widget)

Software Type Plugin
Software Slug custom-post-widget (view on wordpress.org)
Patched? Yes
Remediation Update to version 3.3.1, or a newer patched version
Affected Version
  • <= 3.3.0
Patched Version
  • 3.3.1

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