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National Vulnerability Database

National Vulnerability Database

NVD

National Vulnerability Database
  1. Vulnerabilities

CVE-2026-9227 Detail

Description

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 only verifies whether the filename contains the string '.json' rather than confirming the filename ends with a .json extension, allowing double-extension filenames like shell.json.php to bypass validation. This makes it possible for authenticated attackers, with author-level access and above, to upload files that may be executable, which makes remote code execution possible.


Metrics

 
NVD enrichment efforts reference publicly available information to associate vector strings. CVSS information contributed by other sources is also displayed.
CVSS 4.0 Severity and Vector Strings:

NIST CVSS score
NIST: NVD
N/A
NVD assessment not yet provided.

References to Advisories, Solutions, and Tools

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URL Source(s) Tag(s)
https://github.com/cssigniter/gutenbee/commit/bde934cdecf67a4de1d6548cc1fc6c59bc6690e5 Wordfence
https://plugins.trac.wordpress.org/browser/gutenbee/tags/2.20.0/gutenbee.php#L570 Wordfence
https://plugins.trac.wordpress.org/browser/gutenbee/tags/2.20.0/gutenbee.php#L571 Wordfence
https://plugins.trac.wordpress.org/browser/gutenbee/tags/2.20.0/gutenbee.php#L579 Wordfence
https://plugins.trac.wordpress.org/browser/gutenbee/tags/2.20.1/gutenbee.php#L570 Wordfence
https://plugins.trac.wordpress.org/browser/gutenbee/tags/2.20.1/gutenbee.php#L571 Wordfence
https://plugins.trac.wordpress.org/browser/gutenbee/tags/2.20.1/gutenbee.php#L579 Wordfence
https://plugins.trac.wordpress.org/changeset?sfp_email=&sfph_mail=&reponame=&old=3543574%40gutenbee&new=3543574%40gutenbee&sfp_email=&sfph_mail= Wordfence
https://www.wordfence.com/threat-intel/vulnerabilities/id/2d20e8c9-975d-4e8c-8bea-50935853c7d4?source=cve Wordfence

Weakness Enumeration

CWE-ID CWE Name Source
CWE-434 Unrestricted Upload of File with Dangerous Type Wordfence  

Change History

1 change records found show changes

Quick Info

CVE Dictionary Entry:
CVE-2026-9227
NVD Published Date:
05/28/2026
NVD Last Modified:
05/28/2026
Source:
Wordfence