CVE-2024-34566: WordPress Content Blocks (Custom Post Widget) plugin <= 3.3.0 - Cross Site Scripting (XSS) vulnerability

Severity: medium (CVSS 5.4 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.3% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2024-05-08 · updated 2026-06-17
Weakness: CWE-79

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 products

vanderwijk Content Blocks (Custom Post Widget): before 3.3.1 — fixed in 3.3.1

How to fix

Upgrade to a fixed version: vanderwijk Content Blocks (Custom Post Widget) 3.3.1. Check the vendor advisory for mitigations.

References

https://patchstack.com/database/vulnerability/custom-post-widget/wordpress-content-blocks-custom-post-widget-plugin-3-3-0-cross-site-scripting-xss-vulnerability?_s_id=cve
https://patchstack.com/database/vulnerability/custom-post-widget/wordpress-content-blocks-custom-post-widget-plugin-3-3-0-cross-site-scripting-xss-vulnerability?_s_id=cve

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