Vulnerabilities and security researches forcustom-post-widget custom-post-widget

Apr 20, 2026

CVE, Research URL: CVE-2026-0894
Home page URL: Security reports for Content Blocks (Custom Post Widget)
Application: Content Blocks (Custom Post Widget)
Date: Apr 18, 2026
Research 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.
Affected versions: max 3.4.1.
Status: vulnerable

Feb 22, 2025

CVE, Research URL: CVE-2024-6432
Home page URL: Security reports for Content Blocks (Custom Post Widget)
Application: Content Blocks (Custom Post Widget)
Date: Feb 20, 2025
Research Description: The Content Blocks (Custom Post Widget) plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the ‘content’ parameter within the plugin's shortcode Content Block in all versions up to, and including, 3.3.5 due to insufficient input sanitization and output escaping. 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.
Affected versions: max 3.3.6.
Status: vulnerable

Sep 08, 2024

CVE, Research URL: CVE-2024-44051
Home page URL: Security reports for Content Blocks (Custom Post Widget)
Application: Content Blocks (Custom Post Widget)
Date: Sep 18, 2024
Research Description: Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting') vulnerability in Johan van der Wijk Content Blocks (Custom Post Widget) allows Stored XSS.This issue affects Content Blocks (Custom Post Widget): from n/a through 3.3.5.
Affected versions: max 3.3.6.
Status: vulnerable

Jun 07, 2024

CVE, Research URL: CVE-2024-3564
Home page URL: Security reports for Content Blocks (Custom Post Widget)
Application: Content Blocks (Custom Post Widget)
Date: Jun 01, 2024
Research 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.
Affected versions: max 3.3.1.
Status: vulnerable

CVE, Research URL: CVE-2024-34566
Home page URL: Security reports for Content Blocks (Custom Post Widget)
Application: Content Blocks (Custom Post Widget)
Date: May 08, 2024
Research Description: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in Johan van der Wijk Content Blocks (Custom Post Widget) allows Stored XSS.This issue affects Content Blocks (Custom Post Widget): from n/a through 3.3.0.
Affected versions: max 3.3.1.
Status: vulnerable

CVE, Research URL: CVE-2024-3565
Home page URL: Security reports for Content Blocks (Custom Post Widget)
Application: Content Blocks (Custom Post Widget)
Date: Jun 01, 2024
Research 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, 3.3.0 due to insufficient input sanitization and output escaping on user supplied attributes. 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.
Affected versions: max 3.3.1.
Status: vulnerable