CVE-2026-9227

HIGH EPSS 46.9%
Published May 28, 20261mo ago · Modified Jun 17, 20262w ago
8.8 CVSS 3.1
High
Find Similar
Published May 28, 2026 1mo ago
Last Modified Jun 17, 2026 2w ago

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.

CVSS Details

Base Score
8.8
Exploitability
2.8
Impact
5.9
Vector string
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Attack Vector Network
Attack Complexity Low
Privileges Required Low
User Interaction None
Scope Unchanged
Confidentiality High
Integrity High
Availability High

Threat Intelligence

EPSS Exploit Probability
46.9% percentile
Exploit & Patch Status
No Known Exploit
No Patch Available

Weaknesses 1

CWE-434 Unrestricted Upload of File with Dangerous Type Resource Mgmt

References 9

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

Remediation

No remediation data recorded yet

Check vendor advisories and the NVD entry for patch availability.