What is CVE-2026-0894?

CVE-2026-0894 is a medium-severity vulnerability in Vanderwijk Content Blocks (Custom Post Widget), classified under Cross-site Scripting. CVSS score: 6.4/10. Published 2026-04-18.

How severe is CVE-2026-0894?

Medium severity. CVSS v3 base score is 6.4 out of 10.

XSS in Vanderwijk Content Blocks (Custom Post Widget)

CVE-2026-0894

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 outpu…

Vulnerability class: XSS (Cross-Site Scripting)

EPSS: 0.000 (1.9th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 6.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N.

Affected products

Vanderwijk Content Blocks (Custom Post Widget) — versions 0

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

Frequently asked questions

What is CVE-2026-0894?: CVE-2026-0894 is a medium-severity vulnerability in Vanderwijk Content Blocks (Custom Post Widget), classified under Cross-site Scripting. CVSS score: 6.4/10. Published 2026-04-18.
How severe is CVE-2026-0894?: Medium severity. CVSS v3 base score is 6.4 out of 10.