CVE-2026-9227— GutenBee <= 2.20.1 - Authenticated (Author+) Arbitrary File Upload via wp_check_filetype_and_ext Filter
Possible ATT&CK Techniques 3AI
T1190 · Exploit Public-Facing Application T1059 · Command and Scripting Interpreter T1505.003 · Web ShellAffected Version Matrix 1
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| cssigniterteam | GutenBee – Gutenberg Blocks | ≤ 2.20.1 | affected |
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I. Basic Information for CVE-2026-9227
Vulnerability Information
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Vulnerability Title
GutenBee <= 2.20.1 - Authenticated (Author+) Arbitrary File Upload via wp_check_filetype_and_ext Filter
Source: NVD (National Vulnerability Database)
Vulnerability 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.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Source: NVD (National Vulnerability Database)
Vulnerability Type
危险类型文件的不加限制上传
Source: NVD (National Vulnerability Database)
Vulnerability Title
WordPress plugin GutenBee – Gutenberg Blocks 代码问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
WordPress和WordPress plugin都是WordPress基金会的产品。WordPress是一套使用PHP语言开发的博客平台。该平台具有在基于PHP和MySQL的服务器上架设个人博客网站的功能。WordPress plugin是一个应用插件。 WordPress plugin GutenBee – Gutenberg Blocks 2.20.1及之前版本存在代码问题漏洞，该漏洞源于gutenbee_file_and_ext_json函数存在任意文件上传问题，因为使用了有缺陷的strpos子
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| cssigniterteam | GutenBee – Gutenberg Blocks | 0 ~ 2.20.1 | - |
II. Public POCs for CVE-2026-9227
| # | POC Description | Source Link | Shenlong Link |
|---|
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Patches & Fixes for CVE-2026-9227 (7)
Other References for CVE-2026-9227 (1)
Other References for CVE-2026-9227 (1)
IV. Related Vulnerabilities
Same vendor: cssigniterteam
Same weakness: CWE-434
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V. Comments for CVE-2026-9227
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