CVE-2026-6261— Betheme <= 28.4 - Authenticated (Author+) Arbitrary File Upload to Remote Code Execution via Icon Pack Upload
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I. Basic Information for CVE-2026-6261
Vulnerability Information
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Vulnerability Title
Betheme <= 28.4 - Authenticated (Author+) Arbitrary File Upload to Remote Code Execution via Icon Pack Upload
Source: NVD (National Vulnerability Database)
Vulnerability Description
The Betheme theme for WordPress is vulnerable to Arbitrary File Upload in versions up to, and including, 28.4. This is due to the upload_icons() function workflow moving and unzipping user-controlled ZIP files into a public uploads directory without validating extracted file types. This makes it possible for authenticated attackers, with author-level access and above, to upload arbitrary files (including PHP) and achieve remote code execution via the Icons icon-pack upload flow.
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 Betheme 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 Betheme 28.4及之前版本存在代码问题漏洞，该漏洞源于upload_icons()函数工作流将用户控制的ZIP文件移动并解压到公共上传目录而未验证提取的文件类型，可能导致任意文件上传和远程代码执行。
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 |
|---|---|---|---|---|
| MuffinGroup | Betheme | 0 ~ 28.4 | - |
II. Public POCs for CVE-2026-6261
| # | POC Description | Source Link | Shenlong Link |
|---|
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IV. Related Vulnerabilities
Same product: Betheme
- CVE-2026-6262
Betheme <= 28.4 - Authenticated (Contributor+) Arbitrary Fil - CVE-2025-63075
WordPress Betheme theme <= 28.2 - Cross Site Scripting (XSS) - CVE-2025-9371
Betheme <= 28.1.6 - Authenticated (Contributor+) Stored Cros - CVE-2025-7399
Betheme <= 28.1.3 - Authenticated (Contributor+) Stored Cros - CVE-2025-3077
Betheme <= 28.0.3 - Authenticated (Contributor+) Stored Cros
Same vendor: MuffinGroup
- CVE-2026-6262
Betheme <= 28.4 - Authenticated (Contributor+) Arbitrary Fil - CVE-2025-63075
WordPress Betheme theme <= 28.2 - Cross Site Scripting (XSS) - CVE-2025-9371
Betheme <= 28.1.6 - Authenticated (Contributor+) Stored Cros - CVE-2025-7399
Betheme <= 28.1.3 - Authenticated (Contributor+) Stored Cros - CVE-2025-3077
Betheme <= 28.0.3 - Authenticated (Contributor+) Stored Cros
Same weakness: CWE-434
- CVE-2021-47943
TextPattern CMS 4.8.7 Remote Code Execution via File Upload - CVE-2021-47937
e107 CMS 2.3.0 Authenticated Remote Code Execution via Theme - CVE-2026-41517
Emlog: Remote Code Execution via Malicious Plugin Upload - CVE-2026-6692
Slider Revolution 7.0.0 - 7.0.10 - Authenticated (Subscriber - CVE-2026-41587
CI4MS: Unrestricted PHP File Upload via Theme Installation L
V. Comments for CVE-2026-6261
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