What is CVE-2026-9227?

CVE-2026-9227 is a high-severity vulnerability in Cssigniterteam Gutenbee – Gutenberg Blocks, classified under Unrestricted Upload of File with Dangerous Type. CVSS score: 8.8/10. Published 2026-05-28.

How severe is CVE-2026-9227?

High severity. CVSS v3 base score is 8.8 out of 10.

Arbitrary file upload in Cssigniterteam Gutenbee – Gutenberg Blocks

CVE-2026-9227

The GutenBee – Gutenberg Blocks plugin for WordPress is vulnerable to Arbitrary File Upload in all versions up to, and including, 2.20.1 via the gutenbee_file_and_ext_json function. This is due to a flawed strpos() substring check that onl…

Vulnerability class: Unrestricted File Upload

EPSS: 0.002 (36.3th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

Affected products

Cssigniterteam Gutenbee – Gutenberg Blocks — versions 0

Weakness classification (CWE)

CWE-434 — Unrestricted Upload of File with Dangerous Type

References

Frequently asked questions

What is CVE-2026-9227?: CVE-2026-9227 is a high-severity vulnerability in Cssigniterteam Gutenbee – Gutenberg Blocks, classified under Unrestricted Upload of File with Dangerous Type. CVSS score: 8.8/10. Published 2026-05-28.
How severe is CVE-2026-9227?: High severity. CVSS v3 base score is 8.8 out of 10.