CVE-2024-3565

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.

Score

CVSS 3.1 6.4 Medium

Status

Modified - security@wordfence.com

Published

2024-06-01

Last modified

2026-04-08

Weaknesses

CWE-79

Affected products

• Content Blocks Custom Post Widget (Johan Van Der Wijk)
• Content Blocks (Vanderwijk)
• Content Blocks Custom Post Widget (Vanderwijk)

References

• https://plugins.trac.wordpress.org/browser/custom-post-widget/trunk/shortcode.php#L62
• https://plugins.trac.wordpress.org/changeset?sfp_email=&sfph_mail=&reponame=&old=3078739%40custom-post-widget&new=30787…
• https://www.wordfence.com/threat-intel/vulnerabilities/id/16d8eab2-953a-46bf-a0f6-296bcea86305?source=cve