What is CVE-2026-16623?

CVE-2026-16623 is a high-severity vulnerability in Create Block Theme, classified under Code Injection. CVSS score: 8.0/10. Published 2026-08-04.

How severe is CVE-2026-16623?

High severity. CVSS v3 base score is 8.0 out of 10.

RCE in Create Block Theme

CVE-2026-16623

The Create Block WordPress plugin before 2.10.0 does not correctly escape user-supplied text before writing it into a generated PHP pattern file, allowing a multisite subsite administrator (who holds the capability gating this action but…

Vulnerability class: RCE (Remote Code Execution)

CVSS v3 metric

CVSS v3 base score 8.0 (High). Vector: CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H.

Affected products

Unknown Create Block Theme — versions 0

Weakness classification (CWE)

CWE-94 — Code Injection

References

contact@wpscan.com (technical-description, exploit, vdb-entry)

Frequently asked questions

What is CVE-2026-16623?: CVE-2026-16623 is a high-severity vulnerability in Create Block Theme, classified under Code Injection. CVSS score: 8.0/10. Published 2026-08-04.
How severe is CVE-2026-16623?: High severity. CVSS v3 base score is 8.0 out of 10.